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Finding the Fourth Proportional to 13,545.18, 18,691.74 and 7,576.74

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Solution

The fourth proportional to 13,545.18, 18,691.74 and 7,576.74 is: 10,455.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,545.18 : 18,691.74 = 7,576.74 : x
  2. Step 2: Convert to fraction form
    13,545.18/18,691.74 = 7,576.74/x
  3. Step 3: Cross multiply
    13,545.18x = 18,691.74 × 7,576.74
  4. Step 4: Simplify right side
    13,545.18x = 141,622,454.13
  5. Step 5: Solve for x
    x = 141,622,454.13/13,545.18
  6. Step 6: Final answer
    x = 10,455.56

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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.