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Finding the Fourth Proportional to 16,915.97, 25,375.66 and 5,821.20

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Solution

The fourth proportional to 16,915.97, 25,375.66 and 5,821.20 is: 8,732.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,915.97 : 25,375.66 = 5,821.20 : x
  2. Step 2: Convert to fraction form
    16,915.97/25,375.66 = 5,821.20/x
  3. Step 3: Cross multiply
    16,915.97x = 25,375.66 × 5,821.20
  4. Step 4: Simplify right side
    16,915.97x = 147,716,810.18
  5. Step 5: Solve for x
    x = 147,716,810.18/16,915.97
  6. Step 6: Final answer
    x = 8,732.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.