Home / 16,815.78-25,227.40-5,129.90

Finding the Fourth Proportional to 16,815.78, 25,227.40 and 5,129.90

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Solution

The fourth proportional to 16,815.78, 25,227.40 and 5,129.90 is: 7,695.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,815.78 : 25,227.40 = 5,129.90 : x
  2. Step 2: Convert to fraction form
    16,815.78/25,227.40 = 5,129.90/x
  3. Step 3: Cross multiply
    16,815.78x = 25,227.40 × 5,129.90
  4. Step 4: Simplify right side
    16,815.78x = 129,414,039.26
  5. Step 5: Solve for x
    x = 129,414,039.26/16,815.78
  6. Step 6: Final answer
    x = 7,695.99

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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.