Home / 20,311.38-30,469.59-7,161.12

Finding the Fourth Proportional to 20,311.38, 30,469.59 and 7,161.12

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Solution

The fourth proportional to 20,311.38, 30,469.59 and 7,161.12 is: 10,742.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.38 : 30,469.59 = 7,161.12 : x
  2. Step 2: Convert to fraction form
    20,311.38/30,469.59 = 7,161.12/x
  3. Step 3: Cross multiply
    20,311.38x = 30,469.59 × 7,161.12
  4. Step 4: Simplify right side
    20,311.38x = 218,196,390.34
  5. Step 5: Solve for x
    x = 218,196,390.34/20,311.38
  6. Step 6: Final answer
    x = 10,742.57

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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.