Home / 20,926.72-31,377.92-8,436.52

Finding the Fourth Proportional to 20,926.72, 31,377.92 and 8,436.52

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Solution

The fourth proportional to 20,926.72, 31,377.92 and 8,436.52 is: 12,649.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,926.72 : 31,377.92 = 8,436.52 : x
  2. Step 2: Convert to fraction form
    20,926.72/31,377.92 = 8,436.52/x
  3. Step 3: Cross multiply
    20,926.72x = 31,377.92 × 8,436.52
  4. Step 4: Simplify right side
    20,926.72x = 264,720,449.64
  5. Step 5: Solve for x
    x = 264,720,449.64/20,926.72
  6. Step 6: Final answer
    x = 12,649.88

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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.