Weighed Average DAX Expression

Hi ROBERTOCMRNO,

Could you post your all table structures with some sample data in this case? Without knowing that we can only guess and offer possible suggestions.:smileyhappy:

Normally, the DAX expression for Weighted Average should be similar like below.

[Average Med Age Weighted by Pop]=
SUMX(Zips, Zips[TTL Pop] * Zips[Med Age]) / [Total Population]

And

WAC = SUMX ( 'Analytics_SourceDat', [Net_Active_Balance] * [INTEREST_RATE] )
    / SUMX ( 'Analytics_SourceDat', [Net_Active_Balance] )

In addition, here is a similar thread, and here is a good article about Weighted Averages(DAX) for your reference.

Regards