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Finding the Fourth Proportional to 39,049.72, 58,572.70 and 12,751

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Solution

The fourth proportional to 39,049.72, 58,572.70 and 12,751 is: 19,125.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,049.72 : 58,572.70 = 12,751 : x
  2. Step 2: Convert to fraction form
    39,049.72/58,572.70 = 12,751/x
  3. Step 3: Cross multiply
    39,049.72x = 58,572.70 × 12,751
  4. Step 4: Simplify right side
    39,049.72x = 746,860,497.70
  5. Step 5: Solve for x
    x = 746,860,497.70/39,049.72
  6. Step 6: Final answer
    x = 19,125.89

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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.