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Finding the Fourth Proportional to 18,658.62, 27,991.62 and 5,331.73

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Solution

The fourth proportional to 18,658.62, 27,991.62 and 5,331.73 is: 7,998.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,658.62 : 27,991.62 = 5,331.73 : x
  2. Step 2: Convert to fraction form
    18,658.62/27,991.62 = 5,331.73/x
  3. Step 3: Cross multiply
    18,658.62x = 27,991.62 × 5,331.73
  4. Step 4: Simplify right side
    18,658.62x = 149,243,760.10
  5. Step 5: Solve for x
    x = 149,243,760.10/18,658.62
  6. Step 6: Final answer
    x = 7,998.65

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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.