Question

Find the missing ratio 8:28::15:?

Answer 1

8:28::15:?

=a:b::c:d

=a/b=c/d

=>8×d=28×15 (by cross multiplication)

=>8d=420

=>d=420/8

=>d=52.5

So the answer is 8:28::15:52.5 (Ans)

Answer 2

Answer:

Missing ratio is $52.5$ .

Step-by-step explanation:

To find : missing ratio .

Given : $8:28::15:\ ?$

Solution :

• As we can see that in the given ratio of proportion ,fourth ratio is missing . Let ,missing ratio be $x$ .  
• To find fourth ratio we write as $8:28::15:x$   .
• Here , $28$ and $15$ are called as means whereas , $8$ and $x$ are called as extremes .
• We know that , product of means = product of extremes  
• Hence , substituting values in the above formula to find the value of missing ratio using transposition method . by transposing constants at RHS and leaving variables at LHS .

        $28\times 15 = 8\times x \\\\ 420 = 8x \\\\x = \frac{420}{8}\\\\x = 52.5$