Home / 20,989.20-31,488.96-6,198.04

Finding the Fourth Proportional to 20,989.20, 31,488.96 and 6,198.04

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Solution

The fourth proportional to 20,989.20, 31,488.96 and 6,198.04 is: 9,298.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.20 : 31,488.96 = 6,198.04 : x
  2. Step 2: Convert to fraction form
    20,989.20/31,488.96 = 6,198.04/x
  3. Step 3: Cross multiply
    20,989.20x = 31,488.96 × 6,198.04
  4. Step 4: Simplify right side
    20,989.20x = 195,169,833.64
  5. Step 5: Solve for x
    x = 195,169,833.64/20,989.20
  6. Step 6: Final answer
    x = 9,298.58

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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.