Help to protr

I have budget Amount which is by Month. I have a report that runs weekly every month. Actual Amount grows by charges weekly but budget is fixed. How can l split budget amount weekly to properly reflect close comparative view

Week 1:  Actual - 1000 Budget - 6500

Week 2:  Actual - 2500 Budget - 6500

Week 3:  Actual - 4900 Budget - 6500

Week 4:  Actual - 6700 Budget - 6500

I Need:

Week 1:  Actual - 1000 Budget - 6500÷4

Week 2:  Actual - 2500 Budget - 6500÷3

Week 3:  Actual - 4900 Budget - 6500÷2

Week 4:  Actual - 6700 Budget - 6500÷1

Is there a way to query using actual calendar date to split the budget by when report is run? It could be split by day not necesarilly by week.

All help appreciated.