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Finding the Fourth Proportional to 40,260.84, 60,399.90 and 12,561

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Solution

The fourth proportional to 40,260.84, 60,399.90 and 12,561 is: 18,844.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,260.84 : 60,399.90 = 12,561 : x
  2. Step 2: Convert to fraction form
    40,260.84/60,399.90 = 12,561/x
  3. Step 3: Cross multiply
    40,260.84x = 60,399.90 × 12,561
  4. Step 4: Simplify right side
    40,260.84x = 758,683,143.90
  5. Step 5: Solve for x
    x = 758,683,143.90/40,260.84
  6. Step 6: Final answer
    x = 18,844.20

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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.