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Finding the Fourth Proportional to 16,591.20, 24,915.60 and 8,815.20

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Solution

The fourth proportional to 16,591.20, 24,915.60 and 8,815.20 is: 13,238.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,591.20 : 24,915.60 = 8,815.20 : x
  2. Step 2: Convert to fraction form
    16,591.20/24,915.60 = 8,815.20/x
  3. Step 3: Cross multiply
    16,591.20x = 24,915.60 × 8,815.20
  4. Step 4: Simplify right side
    16,591.20x = 219,635,997.12
  5. Step 5: Solve for x
    x = 219,635,997.12/16,591.20
  6. Step 6: Final answer
    x = 13,238.10

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1.5x scale

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.