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Finding the Fourth Proportional to 20,343.63, 30,520.11 and 7,863.76

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Solution

The fourth proportional to 20,343.63, 30,520.11 and 7,863.76 is: 11,797.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.63 : 30,520.11 = 7,863.76 : x
  2. Step 2: Convert to fraction form
    20,343.63/30,520.11 = 7,863.76/x
  3. Step 3: Cross multiply
    20,343.63x = 30,520.11 × 7,863.76
  4. Step 4: Simplify right side
    20,343.63x = 240,002,887.85
  5. Step 5: Solve for x
    x = 240,002,887.85/20,343.63
  6. Step 6: Final answer
    x = 11,797.44

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1.5x scale

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.