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Finding the Fourth Proportional to 28,325.93, 42,488.90 and 13,489.87

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Solution

The fourth proportional to 28,325.93, 42,488.90 and 13,489.87 is: 20,234.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,325.93 : 42,488.90 = 13,489.87 : x
  2. Step 2: Convert to fraction form
    28,325.93/42,488.90 = 13,489.87/x
  3. Step 3: Cross multiply
    28,325.93x = 42,488.90 × 13,489.87
  4. Step 4: Simplify right side
    28,325.93x = 573,169,737.44
  5. Step 5: Solve for x
    x = 573,169,737.44/28,325.93
  6. Step 6: Final answer
    x = 20,234.81

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Similar ratio
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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.