Home / 13,791.33-20,687.21-3,930.84

Finding the Fourth Proportional to 13,791.33, 20,687.21 and 3,930.84

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Solution

The fourth proportional to 13,791.33, 20,687.21 and 3,930.84 is: 5,896.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.33 : 20,687.21 = 3,930.84 : x
  2. Step 2: Convert to fraction form
    13,791.33/20,687.21 = 3,930.84/x
  3. Step 3: Cross multiply
    13,791.33x = 20,687.21 × 3,930.84
  4. Step 4: Simplify right side
    13,791.33x = 81,318,092.90
  5. Step 5: Solve for x
    x = 81,318,092.90/13,791.33
  6. Step 6: Final answer
    x = 5,896.32

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1.5x scale

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.