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Finding the Fourth Proportional to 18,662.38, 27,993.66 and 4,811.38

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Solution

The fourth proportional to 18,662.38, 27,993.66 and 4,811.38 is: 7,217.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,662.38 : 27,993.66 = 4,811.38 : x
  2. Step 2: Convert to fraction form
    18,662.38/27,993.66 = 4,811.38/x
  3. Step 3: Cross multiply
    18,662.38x = 27,993.66 × 4,811.38
  4. Step 4: Simplify right side
    18,662.38x = 134,688,135.85
  5. Step 5: Solve for x
    x = 134,688,135.85/18,662.38
  6. Step 6: Final answer
    x = 7,217.09

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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.