Proportions

Front

What is a proportion?

Back

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

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then isolate the variable.

Front

What is the cross-multiplication method?

Back

The cross-multiplication method involves multiplying the numerator of one ratio by the denominator of the other ratio.

Front

If 1 pizza feeds 3 people, how many pizzas are needed for 36 people?

Back

12 pizzas are needed.

Front

If Mary saved $17.50 in 3 weeks, how much will she save in 15 weeks?

Back

Mary will save $87.50.

Front

Back

h = 21.25 ft.

Front

Back

k = \frac{66}{5}.

Front

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

Back

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division.

Front

How can proportions be used in real-life situations?

Back

Proportions can be used to solve problems involving scaling, such as recipes, maps, and model building.