 Hello all and welcome to the session. Here the question is, find the first proportional to 6, 18 and 3. Now before starting the solution of this question, we also know a result of a proportion and that is if a is to b as c is to d which implies a is to b is equal to c is to d then product of extremes is equal to product of means. Here b and c are the means and a and d are the extremes which implies the product of extreme will be a into d that is a d and product of means will be b into c that is c and where a is called the first proportional b is called the second proportional c is called the third proportional and d is called the fourth proportional. Now this whole result will work as a key idea for solving this question and now we will start with the solution. Let x be the first proportional to 6, 18, 3 is to 18 as this implies is to 18 is equal to 3 is to x where a is and 3 are called the means and 6 are x are called the extremes. Now we know that product of extremes is equal to product of means implies into x is equal to 18 into 3. This implies x is equal to 18 into 3 over 6. Now here 3 into 2 is 6 and 2 into 9 is 18. So this implies x is equal to 9. Therefore the first proportional 18, 3 is 9. So this is the solution of this question and that's all for this session. Hope you have a great other session.