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Finding the Fourth Proportional to 40,603.80, 60,912.26 and 12,517.28

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Solution

The fourth proportional to 40,603.80, 60,912.26 and 12,517.28 is: 18,777.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,603.80 : 60,912.26 = 12,517.28 : x
  2. Step 2: Convert to fraction form
    40,603.80/60,912.26 = 12,517.28/x
  3. Step 3: Cross multiply
    40,603.80x = 60,912.26 × 12,517.28
  4. Step 4: Simplify right side
    40,603.80x = 762,455,661.57
  5. Step 5: Solve for x
    x = 762,455,661.57/40,603.80
  6. Step 6: Final answer
    x = 18,777.94

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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.