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

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.

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Back

Front

Back

k = 5.

Front

What is the scale factor in similar figures?

Back

The scale factor is the ratio of the lengths of corresponding sides of two similar figures.

Front

If two rectangles are similar and one has a width of 4 and the other has a width of 20, what is the scale factor?

Back

The scale factor is 5.

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Front

What does it mean if two ratios are equivalent?

Back

It means that they represent the same relationship between quantities.

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Back

X = 10.