Solving Proportions

Front

What is a proportion?

Back

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

Front

If 15 scoops of lemonade mix make 5 gallons, how many gallons will 6 scoops make?

Back

2 gallons

Front

What is the formula to find a missing value in a proportion?

Back

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

Front

True or False: Ratios can be expressed as fractions.

Back

True

Front

What does it mean if two ratios are equivalent?

Back

It means they represent the same relationship between quantities.

Front

If a recipe calls for 4 cups of flour for 2 cups of sugar, what is the ratio of flour to sugar?

Back

The ratio is 4:2 or simplified to 2:1.

Front

How do you solve the proportion 3/4 = x/12?

Back

Cross-multiply to get 3 * 12 = 4 * x, then solve for x.

Front

What is the first step in solving a proportion?

Back

Identify the two ratios that are being compared.

Front

If 10 apples cost $5, how much do 25 apples cost?

Back

$12.50 (using the proportion 10/5 = 25/x).

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division.