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Finding the Fourth Proportional to 40,219.20, 60,326.64 and 10,638

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Solution

The fourth proportional to 40,219.20, 60,326.64 and 10,638 is: 15,956.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,219.20 : 60,326.64 = 10,638 : x
  2. Step 2: Convert to fraction form
    40,219.20/60,326.64 = 10,638/x
  3. Step 3: Cross multiply
    40,219.20x = 60,326.64 × 10,638
  4. Step 4: Simplify right side
    40,219.20x = 641,754,796.32
  5. Step 5: Solve for x
    x = 641,754,796.32/40,219.20
  6. Step 6: Final answer
    x = 15,956.43

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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.