Question

If 7:x::35:45 then x=?

Ans plz

Answer 1

Answer:

step by step explanation:

step 1 : Cross multiplication

step 2 :divide

Answer 2

Given:  

A proportion 7:x :: 35:45.  

To Find:  

The value of x that satisfies the above proportion is?  

Solution:  

The given problem can be solved using the concepts of ratios and proportions.  

1. The given proportion is 7:x::35:45.  

2. Consider a proportion p:q::r:s, the numbers p, q, and r, s are said to be in proportion only when the ratio of p and q is equal to the ratio of r and s.  

=> p,q and r,s are in proportion only when p:q = r:s.

 

3. Using the property mentioned above,

=> The ratio of 7 and x must be equal to the ratio of 35 and 45,

=> 7:x = 35:45,

=> 7:x = 5x7:5x9,

=> 7/x = 7/9,

=> x = (9x7)/7,

=> x = 9.

Therefore, the value of x for which the proportion is satisfied is 9.