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Finding the Fourth Proportional to 20,462.64, 30,687.90 and 8,773.08

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Solution

The fourth proportional to 20,462.64, 30,687.90 and 8,773.08 is: 13,157.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,462.64 : 30,687.90 = 8,773.08 : x
  2. Step 2: Convert to fraction form
    20,462.64/30,687.90 = 8,773.08/x
  3. Step 3: Cross multiply
    20,462.64x = 30,687.90 × 8,773.08
  4. Step 4: Simplify right side
    20,462.64x = 269,227,401.73
  5. Step 5: Solve for x
    x = 269,227,401.73/20,462.64
  6. Step 6: Final answer
    x = 13,157.02

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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.