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Finding the Fourth Proportional to 40,413.88, 60,621.81 and 13,759.82

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Solution

The fourth proportional to 40,413.88, 60,621.81 and 13,759.82 is: 20,640.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,413.88 : 60,621.81 = 13,759.82 : x
  2. Step 2: Convert to fraction form
    40,413.88/60,621.81 = 13,759.82/x
  3. Step 3: Cross multiply
    40,413.88x = 60,621.81 × 13,759.82
  4. Step 4: Simplify right side
    40,413.88x = 834,145,193.67
  5. Step 5: Solve for x
    x = 834,145,193.67/40,413.88
  6. Step 6: Final answer
    x = 20,640.07

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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.