No, unless you are given more information, you won't be able to find A:B:C: D.

I could very well have A:B = 1:2 and also C: D = 1:2, but where A = 2, B = 4, C = 3, D = 6. THe ratio stilll holds, but you cannot directly find A:B:C: D unless you have something to compare one of each of the ratios given.