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June 10th, 2017, 06:22 AM   #1
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Weighted average?

Dear Math community

I'm struggling with a small math issue and I hope some of you can help.

Assume we have a list of numbers

20000
45000
-1500
2444
-5000

sum: 60944

Now I want to take the first figure (20000) and split it across the 4 remaining sums according to their weight (if that makes sense).

Is there a formula for a calculation like this?

Thanks in advance
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June 10th, 2017, 12:50 PM   #2
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My guess - use magnitudes for weights.
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June 11th, 2017, 05:13 AM   #3
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Quote:
Originally Posted by mathman View Post
My guess - use magnitudes for weights.
Could you please give me an example of how you would do the calculation?
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June 11th, 2017, 01:58 PM   #4
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Total = 45000+1500+2444+5000. First weight = 45000/total, etc.
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