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Finding the Fourth Proportional to 43,491.75, 65,219.17 and 15,418.87

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Solution

The fourth proportional to 43,491.75, 65,219.17 and 15,418.87 is: 23,121.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,491.75 : 65,219.17 = 15,418.87 : x
  2. Step 2: Convert to fraction form
    43,491.75/65,219.17 = 15,418.87/x
  3. Step 3: Cross multiply
    43,491.75x = 65,219.17 × 15,418.87
  4. Step 4: Simplify right side
    43,491.75x = 1,005,605,903.74
  5. Step 5: Solve for x
    x = 1,005,605,903.74/43,491.75
  6. Step 6: Final answer
    x = 23,121.76

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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.