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Finding the Fourth Proportional to 18,591.26, 27,896.45 and 12,355.56

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Solution

The fourth proportional to 18,591.26, 27,896.45 and 12,355.56 is: 18,539.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,591.26 : 27,896.45 = 12,355.56 : x
  2. Step 2: Convert to fraction form
    18,591.26/27,896.45 = 12,355.56/x
  3. Step 3: Cross multiply
    18,591.26x = 27,896.45 × 12,355.56
  4. Step 4: Simplify right side
    18,591.26x = 344,676,199.98
  5. Step 5: Solve for x
    x = 344,676,199.98/18,591.26
  6. Step 6: Final answer
    x = 18,539.70

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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.