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Finding the Fourth Proportional to 28,523, 42,801.78 and 12,107

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Solution

The fourth proportional to 28,523, 42,801.78 and 12,107 is: 18,167.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,523 : 42,801.78 = 12,107 : x
  2. Step 2: Convert to fraction form
    28,523/42,801.78 = 12,107/x
  3. Step 3: Cross multiply
    28,523x = 42,801.78 × 12,107
  4. Step 4: Simplify right side
    28,523x = 518,201,150.46
  5. Step 5: Solve for x
    x = 518,201,150.46/28,523
  6. Step 6: Final answer
    x = 18,167.83

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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.