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Finding the Fourth Proportional to 22,663.60, 31,274.28 and 12,591.28

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Solution

The fourth proportional to 22,663.60, 31,274.28 and 12,591.28 is: 17,375.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,663.60 : 31,274.28 = 12,591.28 : x
  2. Step 2: Convert to fraction form
    22,663.60/31,274.28 = 12,591.28/x
  3. Step 3: Cross multiply
    22,663.60x = 31,274.28 × 12,591.28
  4. Step 4: Simplify right side
    22,663.60x = 393,783,216.28
  5. Step 5: Solve for x
    x = 393,783,216.28/22,663.60
  6. Step 6: Final answer
    x = 17,375.14

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.