Home / 15,139.28-20,889.80-8,514

Finding the Fourth Proportional to 15,139.28, 20,889.80 and 8,514

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Solution

The fourth proportional to 15,139.28, 20,889.80 and 8,514 is: 11,747.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,139.28 : 20,889.80 = 8,514 : x
  2. Step 2: Convert to fraction form
    15,139.28/20,889.80 = 8,514/x
  3. Step 3: Cross multiply
    15,139.28x = 20,889.80 × 8,514
  4. Step 4: Simplify right side
    15,139.28x = 177,855,757.20
  5. Step 5: Solve for x
    x = 177,855,757.20/15,139.28
  6. Step 6: Final answer
    x = 11,747.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.