This math is so easy. quordle games io

Here is my answer:

Call X is the missing number.

Follow question 10 I have: 5/15=X/12=> X= (5/15)*12=4

The answer is 4. I’m sure that it’s correct 

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I also gave the answer as 4. I have a quick calculation like this

a/b = c/d => c=a*d/b

So the correct result should be 4. wordle game

10.

5/15 = ?/12
1/3 = ?/12
4/12 = ?/12

So ? = 4 #

Thanks