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Finding the Fourth Proportional to 20,185.68, 30,270.84 and 9,234

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Solution

The fourth proportional to 20,185.68, 30,270.84 and 9,234 is: 13,847.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,185.68 : 30,270.84 = 9,234 : x
  2. Step 2: Convert to fraction form
    20,185.68/30,270.84 = 9,234/x
  3. Step 3: Cross multiply
    20,185.68x = 30,270.84 × 9,234
  4. Step 4: Simplify right side
    20,185.68x = 279,520,936.56
  5. Step 5: Solve for x
    x = 279,520,936.56/20,185.68
  6. Step 6: Final answer
    x = 13,847.49

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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.