Worksheets › Solving proportions

Solving proportions worksheet

Solve a/b = c/x for the missing number by cross-multiplying. Harder sets put x anywhere. Free, printable, and the answer key prints on its own page, so the work comes first.

How to solve them

1. Cross-multiply: a/b = c/d means a × d = b × c.
2. Solve the equation that gives you for x.
3. Check: both fractions should simplify to the same thing.

New to this? The short lesson on it has the rules in one place.

Check the key only once you've finished. A wrong answer is useful: find the first line where your working went wrong, fix that, and redo the problem.