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Finding the Fourth Proportional to 43,691, 65,519.86 and 15,605.80

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Solution

The fourth proportional to 43,691, 65,519.86 and 15,605.80 is: 23,402.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,691 : 65,519.86 = 15,605.80 : x
  2. Step 2: Convert to fraction form
    43,691/65,519.86 = 15,605.80/x
  3. Step 3: Cross multiply
    43,691x = 65,519.86 × 15,605.80
  4. Step 4: Simplify right side
    43,691x = 1,022,489,831.19
  5. Step 5: Solve for x
    x = 1,022,489,831.19/43,691
  6. Step 6: Final answer
    x = 23,402.76

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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.