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 Solution Find fourth proportional 3,7,15Solution:Your problem -> fourth proportional 3,7,15In a:b :: c:d, we say that d is the fourth proportional to a,b,c.Let the fourth proportional to the numbers 3, 7, 15 be x.Then, 3:7=15:x:. 3/7=15/x:. x = (7 xx 15)/(3):. x = 35 Solution provided by AtoZmath.com Any wrong solution, solution improvement, feedback then Submit Here Want to know about AtoZmath.com and me