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Finding the Fourth Proportional to 13,432.85, 20,149.34 and 3,572.85

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Solution

The fourth proportional to 13,432.85, 20,149.34 and 3,572.85 is: 5,359.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,432.85 : 20,149.34 = 3,572.85 : x
  2. Step 2: Convert to fraction form
    13,432.85/20,149.34 = 3,572.85/x
  3. Step 3: Cross multiply
    13,432.85x = 20,149.34 × 3,572.85
  4. Step 4: Simplify right side
    13,432.85x = 71,990,551.55
  5. Step 5: Solve for x
    x = 71,990,551.55/13,432.85
  6. Step 6: Final answer
    x = 5,359.29

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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.