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Finding the Fourth Proportional to 39,158.60, 58,747.02 and 11,458.76

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Solution

The fourth proportional to 39,158.60, 58,747.02 and 11,458.76 is: 17,190.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,158.60 : 58,747.02 = 11,458.76 : x
  2. Step 2: Convert to fraction form
    39,158.60/58,747.02 = 11,458.76/x
  3. Step 3: Cross multiply
    39,158.60x = 58,747.02 × 11,458.76
  4. Step 4: Simplify right side
    39,158.60x = 673,168,002.90
  5. Step 5: Solve for x
    x = 673,168,002.90/39,158.60
  6. Step 6: Final answer
    x = 17,190.81

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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.