Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Math
Proportion Calculator
Find the missing fourth value d in any proportion a/b = c/d when three values are known. Perfect for scaling recipes, converting units, solving map distances, and cross-multiplication problems.
Fill in the required fields to see your result.
Math
Linear Equation Solver
Solve any single-variable linear equation of the form ax + b = c instantly. Enter your three known values and get the exact solution for x β useful for algebra homework, engineering, or quick mental-math checks.
Fill in the required fields to see your result.
Key differences
| Proportion Calculator | Linear Equation Solver | |
|---|---|---|
| Category | Math | Math |
| Inputs required | 3 | 3 |
| Result | d | x |
| What it does | Find the missing fourth value d in any proportion a/b = c/d when three values are known. Perfect for scaling recipes, converting units, solving map distances, and cross-multiplication problems. | Solve any single-variable linear equation of the form ax + b = c instantly. Enter your three known values and get the exact solution for x β useful for algebra homework, engineering, or quick mental-math checks. |