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Finding the Fourth Proportional to 28,376.52, 42,584.20 and 9,908.52

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Solution

The fourth proportional to 28,376.52, 42,584.20 and 9,908.52 is: 14,869.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,376.52 : 42,584.20 = 9,908.52 : x
  2. Step 2: Convert to fraction form
    28,376.52/42,584.20 = 9,908.52/x
  3. Step 3: Cross multiply
    28,376.52x = 42,584.20 × 9,908.52
  4. Step 4: Simplify right side
    28,376.52x = 421,946,397.38
  5. Step 5: Solve for x
    x = 421,946,397.38/28,376.52
  6. Step 6: Final answer
    x = 14,869.56

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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.