Home / 13,862.54-20,789.87-5,427.61

Finding the Fourth Proportional to 13,862.54, 20,789.87 and 5,427.61

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Solution

The fourth proportional to 13,862.54, 20,789.87 and 5,427.61 is: 8,139.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,862.54 : 20,789.87 = 5,427.61 : x
  2. Step 2: Convert to fraction form
    13,862.54/20,789.87 = 5,427.61/x
  3. Step 3: Cross multiply
    13,862.54x = 20,789.87 × 5,427.61
  4. Step 4: Simplify right side
    13,862.54x = 112,839,227.20
  5. Step 5: Solve for x
    x = 112,839,227.20/13,862.54
  6. Step 6: Final answer
    x = 8,139.87

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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.