Home / 20,991.20-31,491.96-6,200.04

Finding the Fourth Proportional to 20,991.20, 31,491.96 and 6,200.04

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Solution

The fourth proportional to 20,991.20, 31,491.96 and 6,200.04 is: 9,301.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.20 : 31,491.96 = 6,200.04 : x
  2. Step 2: Convert to fraction form
    20,991.20/31,491.96 = 6,200.04/x
  3. Step 3: Cross multiply
    20,991.20x = 31,491.96 × 6,200.04
  4. Step 4: Simplify right side
    20,991.20x = 195,251,411.68
  5. Step 5: Solve for x
    x = 195,251,411.68/20,991.20
  6. Step 6: Final answer
    x = 9,301.58

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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.