Proportion Solver
Solve a proportion: if a/b = c/x, find x. Cross-multiplication solver.
X
12.0000
Ratio Left0.750000
Ratio Right0.750000
Formula
## How to Solve a Proportion ### Setup **a/b = c/x** ### Cross-Multiplication **a × x = b × c** **x = (b × c) / a** ### Verification After solving, check that a/b equals c/x.
Esempio Risolto
If 3/4 = 9/x, find x.
- 013/4 = 9/x
- 02Cross multiply: 3x = 4 × 9 = 36
- 03x = 36/3 = 12
- 04Check: 3/4 = 0.75, 9/12 = 0.75
Domande Frequenti
What is a proportion?
A proportion is an equation stating that two ratios are equal. For example, 3/4 = 9/12 means the ratios 3:4 and 9:12 are equivalent.
What is cross-multiplication?
Cross-multiplication means multiplying the numerator of each fraction by the denominator of the other. If a/b = c/d, then ad = bc.
Where are proportions used?
Proportions are used in scaling recipes, map distances, similar triangles, mixing solutions, and converting units.
Impara