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, you can use cross-multiplication.

Front

What is cross-multiplication?

Back

Cross-multiplication involves multiplying the numerator of one ratio by the denominator of the other ratio.

Front

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

Back

The cross-multiplication equation is a * d = b * c.

Front

What does it mean if two ratios are equivalent?

Back

If two ratios are equivalent, they represent the same relationship between quantities.

Front

How can you check if two ratios are equivalent?

Back

You can check if two ratios are equivalent by cross-multiplying and comparing the products.

Front

What is the first step in solving a proportion?

Back

The first step is to set the two ratios equal to each other.

Front

If 3/x = 12/16, what is the value of x?

Back

x = 4.

Front

What is the value of x in the proportion 5/x = 15/9?

Back

x = 3.

Front

If 8/12 = x/18, what is x?

Back

x = 12.