Règle de Trois

Résolvez les proportions par multiplication croisée.

Calculateurs

Comment utiliser Règle de Trois

  1. 1Enter the three known values (A, B, C)
  2. 2The calculator finds D = (B × C) / A
  3. 3Use this for unit conversions, recipe scaling, and proportional problems

À propos de Règle de Trois

The Rule of Three Calculator solves proportional reasoning problems. If A is to B as C is to D, enter any three values and it finds the fourth. Also known as cross multiplication, this is fundamental for unit conversions, scaling recipes, and everyday proportion problems.

Questions fréquemment posées

What is the rule of three?

The rule of three (or cross multiplication) finds an unknown value when three values of a proportion are known: D = (B × C) / A.