 Hello and welcome to the session. In this session we discussed the following question which says, find the value of x in the following proportion, 11 is to 10 is equal to x is to 10. Now we know that the four numbers say A, B, C, D are in proportion as in A is to B is proportional to C is to D when the product of extremes which is A and D is equal to the product of the means which is BC. So when given four numbers are in proportion then the product of extremes is equal to the product of the means. This is the key idea that we use in this question. Now we move on to the solution. We are given that 11 is to 10 is equal to x is to 10 that is 11, 10, x and 10 are in proportion. So the product of extremes is equal to the product of the means and so in this case we have product of extremes means product of 11 and 10. So 11 multiplied by 10 is equal to the product of the means which is 10 and x. So 10 into x this means 110 is equal to 10 x to get the value of x we divide both sides by 10 and so we have this 10 cancels with 10, 0 cancels with the 0 and so we get x is equal to 11. So the final value of x is 11 which is our final answer. This completes this session. Hope you have understood the solution of this question.