Home / 20,105.20-30,143.22-13,515.04

Finding the Fourth Proportional to 20,105.20, 30,143.22 and 13,515.04

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Solution

The fourth proportional to 20,105.20, 30,143.22 and 13,515.04 is: 20,262.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.20 : 30,143.22 = 13,515.04 : x
  2. Step 2: Convert to fraction form
    20,105.20/30,143.22 = 13,515.04/x
  3. Step 3: Cross multiply
    20,105.20x = 30,143.22 × 13,515.04
  4. Step 4: Simplify right side
    20,105.20x = 407,386,824.03
  5. Step 5: Solve for x
    x = 407,386,824.03/20,105.20
  6. Step 6: Final answer
    x = 20,262.76

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.