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Finding the Fourth Proportional to 20,443.32, 30,666.20 and 7,961.02

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Solution

The fourth proportional to 20,443.32, 30,666.20 and 7,961.02 is: 11,942.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,443.32 : 30,666.20 = 7,961.02 : x
  2. Step 2: Convert to fraction form
    20,443.32/30,666.20 = 7,961.02/x
  3. Step 3: Cross multiply
    20,443.32x = 30,666.20 × 7,961.02
  4. Step 4: Simplify right side
    20,443.32x = 244,134,115.05
  5. Step 5: Solve for x
    x = 244,134,115.05/20,443.32
  6. Step 6: Final answer
    x = 11,942.00

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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.