Finding the Fourth Proportional to 20,612,615.13, 28,456,452.41 and 15,892,701.95
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Solution
The fourth proportional to 20,612,615.13, 28,456,452.41 and 15,892,701.95 is: 21,940,443.45
Step by Step Solution
- Step 1: Write the proportion equation
20,612,615.13 : 28,456,452.41 = 15,892,701.95 : x - Step 2: Convert to fraction form
20,612,615.13/28,456,452.41 = 15,892,701.95/x - Step 3: Cross multiply
20,612,615.13x = 28,456,452.41 × 15,892,701.95 - Step 4: Simplify right side
20,612,615.13x = 452,249,916,706,489.19 - Step 5: Solve for x
x = 452,249,916,706,489.19/20,612,615.13 - Step 6: Final answer
x = 21,940,443.45
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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.