Home / 13,691.87-20,538.95-5,371.28

Finding the Fourth Proportional to 13,691.87, 20,538.95 and 5,371.28

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Solution

The fourth proportional to 13,691.87, 20,538.95 and 5,371.28 is: 8,057.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691.87 : 20,538.95 = 5,371.28 : x
  2. Step 2: Convert to fraction form
    13,691.87/20,538.95 = 5,371.28/x
  3. Step 3: Cross multiply
    13,691.87x = 20,538.95 × 5,371.28
  4. Step 4: Simplify right side
    13,691.87x = 110,320,321.80
  5. Step 5: Solve for x
    x = 110,320,321.80/13,691.87
  6. Step 6: Final answer
    x = 8,057.36

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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.