Home / 13,791.04-20,687.18-3,931

Finding the Fourth Proportional to 13,791.04, 20,687.18 and 3,931

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Solution

The fourth proportional to 13,791.04, 20,687.18 and 3,931 is: 5,896.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.04 : 20,687.18 = 3,931 : x
  2. Step 2: Convert to fraction form
    13,791.04/20,687.18 = 3,931/x
  3. Step 3: Cross multiply
    13,791.04x = 20,687.18 × 3,931
  4. Step 4: Simplify right side
    13,791.04x = 81,321,304.58
  5. Step 5: Solve for x
    x = 81,321,304.58/13,791.04
  6. Step 6: Final answer
    x = 5,896.68

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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.