Enter proportion values below:

  
---------- ----------
  
  

Denominator 2  =  Denominator 1 * Numerator 2
  Numerator 1

y  =  6 * 21
  18

y  =  126
  18

Answer
Success!
y = 7

↓Steps Explained:↓

You entered the following equivalent proportions:

18
6
=
  
21
y

Define the proportion formula:

If 2 proportions are equal:
we can cross multiply to get:

Numerator 1
Denominator 1
=
  
Numerator 2
Denominator 2

Numerator 1 * Denominator 2 = Denominator 1 * Numerator 2

Solving for Denominator 2 we get:

Denominator 2  =  Denominator 1 * Numerator 2
  Numerator 1

Evaluate and simplfy

y  =  6 * 21
  18

y  =  126
  18

Final Answer

y = 7
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