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Finding the Fourth Proportional to 40,467.76, 60,739.07 and 20,491.30

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Solution

The fourth proportional to 40,467.76, 60,739.07 and 20,491.30 is: 30,755.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,467.76 : 60,739.07 = 20,491.30 : x
  2. Step 2: Convert to fraction form
    40,467.76/60,739.07 = 20,491.30/x
  3. Step 3: Cross multiply
    40,467.76x = 60,739.07 × 20,491.30
  4. Step 4: Simplify right side
    40,467.76x = 1,244,622,505.09
  5. Step 5: Solve for x
    x = 1,244,622,505.09/40,467.76
  6. Step 6: Final answer
    x = 30,755.90

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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.