Proportion

Proportion (proportion) is a arithmetic relationship written as Cross-multiply equal ratios or a/b = c/d → a×d = b×c. Students use it to solve unknowns when enough values are known.

Write Cross-multiply equal ratios, substitute the known numbers carefully, then simplify. Worked walkthrough: 3/4 = x/12 3×12 = 4x x = 9.

Proportion usually appears in arithmetic units during middle or secondary school. Match difficulty with MathDigits grade worksheets so practice fits the curriculum year.

On this page the worked result is x = 9. Generate a formula worksheet below for more unique practice sets.