If the relation between x and y in order that the `20^(th)` arithmetic mean between x and 2y is same as the `20^(th)` arithmetic mean between 2x and y

If the relation between x and y in order that the `20^(th)` arithmetic mean between x and 2y is same as the `20^(th)` arithmetic mean between 2x and y
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If the relation between x and y in order that the `20^(th)` arithmetic mean between x and 2y is same as ... inserted in each case )is y = Kx, find K.
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