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MatemáticasMatemáticas153 views·Updated Jun 25, 2026·2 pages

Comprendiendo Razones y Progresiones

C
Catherine Pérez Caballero@catherineprezca

¿Alguna vez te has preguntado cómo los chefs ajustan las...

1
of 2
Razones y Proporciones

Una proporción es la igualdad de dos razones.

$
\frac{A}{B} = \frac{C}{D}
$

(el porcentaje se puede calcular como

Proporciones Directas: La Base de Todo

Una proporción es básicamente cuando dos razones son iguales, como si fuera una balanza perfectamente equilibrada. Se escribe así: A/B = C/D, donde cada fracción representa una razón.

Para resolver una proporción directa, solo tienes que multiplicar en cruz. Por ejemplo, si tienes 3/x = 8/7, multiplicas 3 × 7 = 8 × x. Esto te da 21 = 8x, y despejando obtienes x = 21/8.

💡 Tip clave: Los porcentajes también son proporciones directas disfrazadas. Si algo aumenta 15%, la proporción sería 100/115.

Esta técnica es súper útil para calcular descuentos, convertir unidades o resolver problemas de velocidad en física.

2
of 2
Razones y Proporciones

Una proporción es la igualdad de dos razones.

$
\frac{A}{B} = \frac{C}{D}
$

(el porcentaje se puede calcular como

Proporciones Inversas: Cuando Todo se Voltea

Las proporciones inversas son como el hermano rebelde de las directas. Aquí, cuando una cantidad aumenta, la otra disminuye proporcionalmente.

Para resolver 6/2 = 9/X, primero inviertes una de las razones: 6/9 = X/2. Después aplicas la misma regla de multiplicar en cruz: 6 × 2 = 9 × X, lo que te da 12 = 9X, entonces X = 12/9.

🎯 Recuerda: Si trabajas más rápido, terminas en menos tiempo. Si hay más trabajadores, cada uno hace menos trabajo individual.

Esto aparece en situaciones reales como la velocidad vs. tiempo de viaje, o la cantidad de trabajadores vs. tiempo para completar un proyecto.

We thought you’d never ask...

What is the Knowunity AI companion?

Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.

Where can I download the Knowunity app?

You can download the app in the Google Play Store and in the Apple App Store.

Is Knowunity really free of charge?

That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.

Similar Content

Most popular content in Matemáticas

9

Most popular content

9

Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

4.6/5App Store
4.7/5Google Play

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan SiOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha KlichAndroid user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

AnnaiOS user

MatemáticasMatemáticas153 views·Updated Jun 25, 2026·2 pages

Comprendiendo Razones y Progresiones

C
Catherine Pérez Caballero@catherineprezca

¿Alguna vez te has preguntado cómo los chefs ajustan las recetas o cómo funcionan los mapas a escala? Todo se basa en razones y proporciones, herramientas matemáticas que usamos constantemente sin darnos cuenta.

1
of 2
Razones y Proporciones

Una proporción es la igualdad de dos razones.

$
\frac{A}{B} = \frac{C}{D}
$

(el porcentaje se puede calcular como

Sign up to see the content. It's free!

  • Access to all documents
  • Improve your grades
  • Join milions of students

Proporciones Directas: La Base de Todo

Una proporción es básicamente cuando dos razones son iguales, como si fuera una balanza perfectamente equilibrada. Se escribe así: A/B = C/D, donde cada fracción representa una razón.

Para resolver una proporción directa, solo tienes que multiplicar en cruz. Por ejemplo, si tienes 3/x = 8/7, multiplicas 3 × 7 = 8 × x. Esto te da 21 = 8x, y despejando obtienes x = 21/8.

💡 Tip clave: Los porcentajes también son proporciones directas disfrazadas. Si algo aumenta 15%, la proporción sería 100/115.

Esta técnica es súper útil para calcular descuentos, convertir unidades o resolver problemas de velocidad en física.

2
of 2
Razones y Proporciones

Una proporción es la igualdad de dos razones.

$
\frac{A}{B} = \frac{C}{D}
$

(el porcentaje se puede calcular como

Sign up to see the content. It's free!

  • Access to all documents
  • Improve your grades
  • Join milions of students

Proporciones Inversas: Cuando Todo se Voltea

Las proporciones inversas son como el hermano rebelde de las directas. Aquí, cuando una cantidad aumenta, la otra disminuye proporcionalmente.

Para resolver 6/2 = 9/X, primero inviertes una de las razones: 6/9 = X/2. Después aplicas la misma regla de multiplicar en cruz: 6 × 2 = 9 × X, lo que te da 12 = 9X, entonces X = 12/9.

🎯 Recuerda: Si trabajas más rápido, terminas en menos tiempo. Si hay más trabajadores, cada uno hace menos trabajo individual.

Esto aparece en situaciones reales como la velocidad vs. tiempo de viaje, o la cantidad de trabajadores vs. tiempo para completar un proyecto.

We thought you’d never ask...

What is the Knowunity AI companion?

Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.

Where can I download the Knowunity app?

You can download the app in the Google Play Store and in the Apple App Store.

Is Knowunity really free of charge?

That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.

Similar Content

Most popular content in Matemáticas

9

Most popular content

9

Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

4.6/5App Store
4.7/5Google Play

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan SiOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha KlichAndroid user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

AnnaiOS user