Solving Proportions


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Vocabulary

  • Proportion-An equation stating that two ratios are equal.
  • Cross Products-The two products found by multiplying the numerator of each ratio by the denominator of the other ratio.

Directions

DON'T ASK!!!! YOU BETTER BE WRITING THIS DOWN!!!

Step 1: Set up your ratios next to each other in fraction form.

ex: 1/5=6/x

Step 2: Cross multiply your numerators and denominator.

ex: 1x=30

Step 3: Solve the one step equation.

Examples

1) 4/x=2/3                                  2) 7/12=x/5

3) x/8=1/2                                  4) 4/5=2/x

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