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Finding the Fourth Proportional to 13,906.45, 20,861.49 and 7,332.88

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Solution

The fourth proportional to 13,906.45, 20,861.49 and 7,332.88 is: 11,000.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,906.45 : 20,861.49 = 7,332.88 : x
  2. Step 2: Convert to fraction form
    13,906.45/20,861.49 = 7,332.88/x
  3. Step 3: Cross multiply
    13,906.45x = 20,861.49 × 7,332.88
  4. Step 4: Simplify right side
    13,906.45x = 152,974,802.79
  5. Step 5: Solve for x
    x = 152,974,802.79/13,906.45
  6. Step 6: Final answer
    x = 11,000.28

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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.