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Finding the Fourth Proportional to 28,869, 39,839.22 and 17,691

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Solution

The fourth proportional to 28,869, 39,839.22 and 17,691 is: 24,413.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,869 : 39,839.22 = 17,691 : x
  2. Step 2: Convert to fraction form
    28,869/39,839.22 = 17,691/x
  3. Step 3: Cross multiply
    28,869x = 39,839.22 × 17,691
  4. Step 4: Simplify right side
    28,869x = 704,795,641.02
  5. Step 5: Solve for x
    x = 704,795,641.02/28,869
  6. Step 6: Final answer
    x = 24,413.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.