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Finding the Fourth Proportional to 18,850.73, 28,285.82 and 7,765.61

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Solution

The fourth proportional to 18,850.73, 28,285.82 and 7,765.61 is: 11,652.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,850.73 : 28,285.82 = 7,765.61 : x
  2. Step 2: Convert to fraction form
    18,850.73/28,285.82 = 7,765.61/x
  3. Step 3: Cross multiply
    18,850.73x = 28,285.82 × 7,765.61
  4. Step 4: Simplify right side
    18,850.73x = 219,656,646.65
  5. Step 5: Solve for x
    x = 219,656,646.65/18,850.73
  6. Step 6: Final answer
    x = 11,652.42

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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.