Home / 21,195.15-31,791.17-8,711.79

Finding the Fourth Proportional to 21,195.15, 31,791.17 and 8,711.79

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Solution

The fourth proportional to 21,195.15, 31,791.17 and 8,711.79 is: 13,067.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195.15 : 31,791.17 = 8,711.79 : x
  2. Step 2: Convert to fraction form
    21,195.15/31,791.17 = 8,711.79/x
  3. Step 3: Cross multiply
    21,195.15x = 31,791.17 × 8,711.79
  4. Step 4: Simplify right side
    21,195.15x = 276,957,953.34
  5. Step 5: Solve for x
    x = 276,957,953.34/21,195.15
  6. Step 6: Final answer
    x = 13,067.04

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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.