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Finding the Fourth Proportional to 18,737.44, 28,115.88 and 13,585.84

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Solution

The fourth proportional to 18,737.44, 28,115.88 and 13,585.84 is: 20,385.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,737.44 : 28,115.88 = 13,585.84 : x
  2. Step 2: Convert to fraction form
    18,737.44/28,115.88 = 13,585.84/x
  3. Step 3: Cross multiply
    18,737.44x = 28,115.88 × 13,585.84
  4. Step 4: Simplify right side
    18,737.44x = 381,977,847.14
  5. Step 5: Solve for x
    x = 381,977,847.14/18,737.44
  6. Step 6: Final answer
    x = 20,385.81

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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.