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Finding the Fourth Proportional to 28,613.28, 42,908.04 and 11,073

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Solution

The fourth proportional to 28,613.28, 42,908.04 and 11,073 is: 16,604.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,613.28 : 42,908.04 = 11,073 : x
  2. Step 2: Convert to fraction form
    28,613.28/42,908.04 = 11,073/x
  3. Step 3: Cross multiply
    28,613.28x = 42,908.04 × 11,073
  4. Step 4: Simplify right side
    28,613.28x = 475,120,726.92
  5. Step 5: Solve for x
    x = 475,120,726.92/28,613.28
  6. Step 6: Final answer
    x = 16,604.90

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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.