Solve Proportions

Front

What is a proportion?

Back

A statement of 2 ratios that are equal to each other.

Front

What is cross multiplication in proportions?

Back

To solve a proportion, multiply the numerator of one ratio by the denominator of the other ratio.

Front

If 3 pounds of hamburger costs $6, how much does 1 pound cost?

Back

$2 per pound.

Front

If Alicia buys 10 pounds of hamburger at $6 for 3 pounds, how much will she pay?

Back

$20.

Front

What is the ratio of total students to boys in a class with 12 girls and 16 boys?

Back

7/4.

Front

How do you simplify the ratio 28:16?

Back

Divide both sides by 4 to get 7:4.

Front

Solve for x: 5/3 = x/15

Back

x = 25.

Front

What is the first step to solve the proportion 15/25 = x/5?

Back

Cross multiply to get 15*5 = 25*x.

Front

What does it mean if two ratios are equivalent?

Back

It means they represent the same relationship or proportion.

Front

If a recipe calls for 2 cups of flour for every 3 cups of sugar, what is the ratio of flour to sugar?

Back

2:3.