In an alloy of German silver the ratio of copper to zinc was 17 : 7 while that of nickel to
zinc was 4 : 3. The ratio of copper to zinc to nickel in the alloy was:
Lets analyze the ratios.
Copper to Zinc = 17 : 7
Nickel to Zinc = 4 : 3
Zinc is common in both and hence we make it have same value in both ratios.
We therefore get the LCM of 3 and 7
The LCM of 3 and 7 is 21
So we multiply the first ratio by 3 and the second one by 7.
Doing this we have :
Copper to Zinc = 51 : 21
Nickel to Zinc = 28 : 21
Now :
Copper to Zinc to Nickel is :
51 : 21 : 28
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