Home / 13,791.24-20,690.10-3,930.66

Finding the Fourth Proportional to 13,791.24, 20,690.10 and 3,930.66

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Solution

The fourth proportional to 13,791.24, 20,690.10 and 3,930.66 is: 5,896.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.24 : 20,690.10 = 3,930.66 : x
  2. Step 2: Convert to fraction form
    13,791.24/20,690.10 = 3,930.66/x
  3. Step 3: Cross multiply
    13,791.24x = 20,690.10 × 3,930.66
  4. Step 4: Simplify right side
    13,791.24x = 81,325,748.47
  5. Step 5: Solve for x
    x = 81,325,748.47/13,791.24
  6. Step 6: Final answer
    x = 5,896.91

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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.