Finding the Fourth Proportional to 7,043,755.80, 9,720,418.86 and 3,988,565.40
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Solution
The fourth proportional to 7,043,755.80, 9,720,418.86 and 3,988,565.40 is: 5,504,240.56
Step by Step Solution
- Step 1: Write the proportion equation
7,043,755.80 : 9,720,418.86 = 3,988,565.40 : x - Step 2: Convert to fraction form
7,043,755.80/9,720,418.86 = 3,988,565.40/x - Step 3: Cross multiply
7,043,755.80x = 9,720,418.86 × 3,988,565.40 - Step 4: Simplify right side
7,043,755.80x = 38,770,526,338,503.44 - Step 5: Solve for x
x = 38,770,526,338,503.44/7,043,755.80 - Step 6: Final answer
x = 5,504,240.56
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.