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Finding the Fourth Proportional to 18,105.80, 27,129.09 and 17,413.82

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Solution

The fourth proportional to 18,105.80, 27,129.09 and 17,413.82 is: 26,092.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,105.80 : 27,129.09 = 17,413.82 : x
  2. Step 2: Convert to fraction form
    18,105.80/27,129.09 = 17,413.82/x
  3. Step 3: Cross multiply
    18,105.80x = 27,129.09 × 17,413.82
  4. Step 4: Simplify right side
    18,105.80x = 472,421,121.41
  5. Step 5: Solve for x
    x = 472,421,121.41/18,105.80
  6. Step 6: Final answer
    x = 26,092.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.