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Finding the Fourth Proportional to 18,770.15, 28,163.07 and 8,234.73

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Solution

The fourth proportional to 18,770.15, 28,163.07 and 8,234.73 is: 12,355.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,770.15 : 28,163.07 = 8,234.73 : x
  2. Step 2: Convert to fraction form
    18,770.15/28,163.07 = 8,234.73/x
  3. Step 3: Cross multiply
    18,770.15x = 28,163.07 × 8,234.73
  4. Step 4: Simplify right side
    18,770.15x = 231,915,277.42
  5. Step 5: Solve for x
    x = 231,915,277.42/18,770.15
  6. Step 6: Final answer
    x = 12,355.54

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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.