Home / 20,451.29-30,689.96-8,764.47

Finding the Fourth Proportional to 20,451.29, 30,689.96 and 8,764.47

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Solution

The fourth proportional to 20,451.29, 30,689.96 and 8,764.47 is: 13,152.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,451.29 : 30,689.96 = 8,764.47 : x
  2. Step 2: Convert to fraction form
    20,451.29/30,689.96 = 8,764.47/x
  3. Step 3: Cross multiply
    20,451.29x = 30,689.96 × 8,764.47
  4. Step 4: Simplify right side
    20,451.29x = 268,981,189.90
  5. Step 5: Solve for x
    x = 268,981,189.90/20,451.29
  6. Step 6: Final answer
    x = 13,152.29

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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.