Home / 13,791.12-20,689.92-3,930.54

Finding the Fourth Proportional to 13,791.12, 20,689.92 and 3,930.54

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Solution

The fourth proportional to 13,791.12, 20,689.92 and 3,930.54 is: 5,896.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.12 : 20,689.92 = 3,930.54 : x
  2. Step 2: Convert to fraction form
    13,791.12/20,689.92 = 3,930.54/x
  3. Step 3: Cross multiply
    13,791.12x = 20,689.92 × 3,930.54
  4. Step 4: Simplify right side
    13,791.12x = 81,322,558.16
  5. Step 5: Solve for x
    x = 81,322,558.16/13,791.12
  6. Step 6: Final answer
    x = 5,896.73

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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.