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Finding the Fourth Proportional to 20,489.41, 30,734.72 and 8,008.93

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Solution

The fourth proportional to 20,489.41, 30,734.72 and 8,008.93 is: 12,013.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.41 : 30,734.72 = 8,008.93 : x
  2. Step 2: Convert to fraction form
    20,489.41/30,734.72 = 8,008.93/x
  3. Step 3: Cross multiply
    20,489.41x = 30,734.72 × 8,008.93
  4. Step 4: Simplify right side
    20,489.41x = 246,152,221.05
  5. Step 5: Solve for x
    x = 246,152,221.05/20,489.41
  6. Step 6: Final answer
    x = 12,013.63

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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.