Home / 11,781.75-17,677.17-3,990.54

Finding the Fourth Proportional to 11,781.75, 17,677.17 and 3,990.54

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Solution

The fourth proportional to 11,781.75, 17,677.17 and 3,990.54 is: 5,987.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,781.75 : 17,677.17 = 3,990.54 : x
  2. Step 2: Convert to fraction form
    11,781.75/17,677.17 = 3,990.54/x
  3. Step 3: Cross multiply
    11,781.75x = 17,677.17 × 3,990.54
  4. Step 4: Simplify right side
    11,781.75x = 70,541,453.97
  5. Step 5: Solve for x
    x = 70,541,453.97/11,781.75
  6. Step 6: Final answer
    x = 5,987.35

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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.