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Finding the Fourth Proportional to 11,469.65, 15,828.75 and 8,631.92

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Solution

The fourth proportional to 11,469.65, 15,828.75 and 8,631.92 is: 11,912.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,469.65 : 15,828.75 = 8,631.92 : x
  2. Step 2: Convert to fraction form
    11,469.65/15,828.75 = 8,631.92/x
  3. Step 3: Cross multiply
    11,469.65x = 15,828.75 × 8,631.92
  4. Step 4: Simplify right side
    11,469.65x = 136,632,424.56
  5. Step 5: Solve for x
    x = 136,632,424.56/11,469.65
  6. Step 6: Final answer
    x = 11,912.52

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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.