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Finding the Fourth Proportional to 41,995.70, 62,978.88 and 12,405.68

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Solution

The fourth proportional to 41,995.70, 62,978.88 and 12,405.68 is: 18,604.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,995.70 : 62,978.88 = 12,405.68 : x
  2. Step 2: Convert to fraction form
    41,995.70/62,978.88 = 12,405.68/x
  3. Step 3: Cross multiply
    41,995.70x = 62,978.88 × 12,405.68
  4. Step 4: Simplify right side
    41,995.70x = 781,295,832.04
  5. Step 5: Solve for x
    x = 781,295,832.04/41,995.70
  6. Step 6: Final answer
    x = 18,604.19

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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.