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Finding the Fourth Proportional to 15,591.89, 23,387.85 and 3,905.12

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Solution

The fourth proportional to 15,591.89, 23,387.85 and 3,905.12 is: 5,857.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,591.89 : 23,387.85 = 3,905.12 : x
  2. Step 2: Convert to fraction form
    15,591.89/23,387.85 = 3,905.12/x
  3. Step 3: Cross multiply
    15,591.89x = 23,387.85 × 3,905.12
  4. Step 4: Simplify right side
    15,591.89x = 91,332,419.26
  5. Step 5: Solve for x
    x = 91,332,419.26/15,591.89
  6. Step 6: Final answer
    x = 5,857.69

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.