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Finding the Fourth Proportional to 18,225.74, 25,134.84 and 12,491.53

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Solution

The fourth proportional to 18,225.74, 25,134.84 and 12,491.53 is: 17,226.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,225.74 : 25,134.84 = 12,491.53 : x
  2. Step 2: Convert to fraction form
    18,225.74/25,134.84 = 12,491.53/x
  3. Step 3: Cross multiply
    18,225.74x = 25,134.84 × 12,491.53
  4. Step 4: Simplify right side
    18,225.74x = 313,972,545.07
  5. Step 5: Solve for x
    x = 313,972,545.07/18,225.74
  6. Step 6: Final answer
    x = 17,226.87

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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.