Proportions

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

If 4 apples cost $2, how much do 10 apples cost?

Back

$5

Front

What are two equal ratios or rates called?

Back

Proportion

Front

If a recipe requires 3 cups of flour for 12 cookies, how much flour is needed for 36 cookies?

Back

9 cups of flour.

Front

What is the formula for finding a missing value in a proportion?

Back

Cross-multiply the ratios and set them equal to each other.

Front

If 5 pencils cost $1, how much do 20 pencils cost?

Back

$4

Front

A Transformer stands 20 ft. tall with a shadow of 6 ft. long. If the Transformer next to it is 30 ft. tall, how long would its shadow be?

Back

9 ft.

Front

In an animal shelter, the ratio of dogs to cats is 4 to 3. If there are 72 dogs at the shelter, how many cats are there?

Back

54 cats.

Front

If a car travels 60 miles in 1 hour, how far will it travel in 3 hours?

Back

180 miles.

Front

What is the relationship between ratios and proportions?

Back

Ratios compare two quantities, while proportions show that two ratios are equal.