Proportions Practice — Solve for the Unknown (Free)
Practice solving proportions with this free tool. It generates equations like 2/3 = x/12, checks your answer instantly, and shows the cross-multiplication method step by step.
How the practice works
- Pick a difficulty.
- Solve for the unknown and press Check.
- See the feedback and step-by-step solution, then press Next.
Cross-multiplication
For a/b = c/d, the cross products are equal: a·d = b·c. Set them equal and solve for the unknown. The solution panel shows the cross-multiply and the divide.
Original price was: $109.99.$54.99Current price is: $54.99.
Frequently asked questions
How do you solve a proportion?
Cross-multiply to get an equation, then divide to isolate the unknown.
Is it free?
Yes — unlimited problems, no sign-up, with progress saved in your browser.
Original price was: $109.99.$54.99Current price is: $54.99.
Are fraction answers accepted?
Yes — type an integer or a fraction; any equivalent form is accepted.
Original price was: $109.99.$54.99Current price is: $54.99.
Read the full lesson: learn the method step by step.
Original price was: $27.99.$17.99Current price is: $17.99.
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