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Finding the Fourth Proportional to 41,780.80, 62,664.48 and 12,191.70

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Solution

The fourth proportional to 41,780.80, 62,664.48 and 12,191.70 is: 18,285.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,780.80 : 62,664.48 = 12,191.70 : x
  2. Step 2: Convert to fraction form
    41,780.80/62,664.48 = 12,191.70/x
  3. Step 3: Cross multiply
    41,780.80x = 62,664.48 × 12,191.70
  4. Step 4: Simplify right side
    41,780.80x = 763,986,540.82
  5. Step 5: Solve for x
    x = 763,986,540.82/41,780.80
  6. Step 6: Final answer
    x = 18,285.59

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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.