Question 1

How do I solve proportions?

Accepted Answer

Cross multiply: if a/b = c/d, then ad = bc. Solve for unknown. 3/4 = x/12: 3×12 = 4x, x = 9.

Question 2

What is a proportion?

Accepted Answer

An equation stating two ratios are equal. 1:2 = 2:4 = 3:6. If a/b = c/d, the values are in proportion.

Question 3

How accurate are these calculations?

Accepted Answer

Our calculator uses double-precision floating-point arithmetic, accurate to about 15-16 significant digits for most calculations.

Question 4

Can I use the result in further calculations?

Accepted Answer

Yes, results are calculated to full precision. You can copy the exact value or use the rounded display depending on your needs.

Proportion Solver Calculator - Free Online

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