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How Do You Solve a Proportion by Finding an Equivalent Ratio?

Solve the following proportion by finding an equivalent ratio.

Summary

  1. 'x' is our unknown variable
  2. To get from 15 to 5, you just divide by 3!
  3. To maintain the ratio 9/15, any division that we do with the denominator has to be applied to the numerator
  4. Plug in the value 3 for x to check.

Notes

    1. 'x' is our unknown variable
    1. 9 and x are numerators
    2. 15 and 5 are denominators
    3. 'x' is our unknown variable
    1. When looking for the relationship between 15 and 5, we need to think about using division or multiplication to convert 15 to 5
    2. 15 divided by 3 is 5
    1. To maintain the ratio 9/15, any division that we do with the denominator has to be applied to the numerator
    2. The numerators are now 9÷3 and x
    1. 'x' is our unknown variable