About 比例式ソルバー
比例式と交差乗算を解く
Use this free online 数学ツール tool to work faster without installing extra software. The interface is built for quick input, clear output, and straightforward results on desktop and mobile devices.
比例式と交差乗算を解く
Solve Proportion: A/B = C/D
Leave one field empty to solve for it
D =
8
3/4 = 6/?
Cross Multiplication Method
A × D = B × C
3 × 8 = 4 × 6
Direct Proportion Calculator
If X increases, Y increases proportionally
Inverse Proportion Calculator
If X increases, Y decreases proportionally
Percentage Proportion
X is what percent of Y? Or X% of Y is what?
25 is 25.00% of 100
Common Proportions
比例式と交差乗算を解く
Use this free online 数学ツール tool to work faster without installing extra software. The interface is built for quick input, clear output, and straightforward results on desktop and mobile devices.
This tool runs in your browser whenever possible, which keeps your inputs private and reduces unnecessary round-trips to the server.