Ratio Calculator
A ratio calculator simplifies mathematical ratios into lowest integers and solves for missing fourth terms in proportionate mathematical equations (A:B = C:D). By applying cross-multiplication, it verifies that a ratio of 8:12 simplifies to 2:3, and solves proportions such as 4/8 = x/16 to find x = 8.
By Daniel Okoro (Mathematics Editor) · Reviewed by Maya ChenUpdated · Published
Ratio A
0
Ratio B
0
Ratio C
0
SOLVED VALUE X
Ratio: 0 : 0 (Simplified: 0 : 0)
How Does the Ratio Calculator Work?
- To simplify: divide both sides of A:B by their greatest common divisor.
- To solve for missing value: use cross-multiplication (A × D = B × C).
What Is the Ratio Formula?
A / B = C / D => D = (B × C) / A
Cross-multiplication to solve for missing proportional terms.
Variables
A, B:Known ratio pair
C, D:Proportional target pair
How Do You Calculate Ratio Step by Step?
Solve 3 : 5 = 12 : XA: 3
B: 5
C: 12
D: ?
Cross multiply: 3 × X = 5 × 12
3X = 60
X = 60 / 3 = 20
Final Solution:X = 20 (Ratio is 12 : 20)
Ratio Questions and Answers
Find the greatest common divisor of 24 and 36, which is 12. Divide both numbers by 12: (24÷12) : (36÷12) = 2:3.
Where Do These Ratio Standards Come From?
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