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Finding the Fourth Proportional to 28,459.41, 42,691.17 and 10,929.24

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Solution

The fourth proportional to 28,459.41, 42,691.17 and 10,929.24 is: 16,394.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,459.41 : 42,691.17 = 10,929.24 : x
  2. Step 2: Convert to fraction form
    28,459.41/42,691.17 = 10,929.24/x
  3. Step 3: Cross multiply
    28,459.41x = 42,691.17 × 10,929.24
  4. Step 4: Simplify right side
    28,459.41x = 466,582,042.81
  5. Step 5: Solve for x
    x = 466,582,042.81/28,459.41
  6. Step 6: Final answer
    x = 16,394.65

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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.