solving 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

If a/b = c/d, what is the cross-multiplication method?

Back

The cross-multiplication method states that a*d = b*c.

Front

Solve the proportion: 2/x = 4/8

Back

x = 4.

Front

Solve the proportion: 3/5 = x/15

Back

x = 9.

Front

What does it mean if two ratios are equivalent?

Back

It means that they represent the same relationship between quantities.

Front

If 10/x = 5/2, what is x?

Back

x = 4.

Front

Solve the proportion: 6/9 = x/12

Back

x = 8.

Front

What is the first step in solving a proportion?

Back

Identify the two ratios that are set equal to each other.

Front

If a proportion is set up as 7/14 = x/28, what is x?

Back

x = 14.