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Finding the Fourth Proportional to 18,351.16, 25,335.09 and 12,081.76

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Solution

The fourth proportional to 18,351.16, 25,335.09 and 12,081.76 is: 16,679.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,351.16 : 25,335.09 = 12,081.76 : x
  2. Step 2: Convert to fraction form
    18,351.16/25,335.09 = 12,081.76/x
  3. Step 3: Cross multiply
    18,351.16x = 25,335.09 × 12,081.76
  4. Step 4: Simplify right side
    18,351.16x = 306,092,413.62
  5. Step 5: Solve for x
    x = 306,092,413.62/18,351.16
  6. Step 6: Final answer
    x = 16,679.73

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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.