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Finding the Fourth Proportional to 18,636.86, 27,949.60 and 5,310.94

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Solution

The fourth proportional to 18,636.86, 27,949.60 and 5,310.94 is: 7,964.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,636.86 : 27,949.60 = 5,310.94 : x
  2. Step 2: Convert to fraction form
    18,636.86/27,949.60 = 5,310.94/x
  3. Step 3: Cross multiply
    18,636.86x = 27,949.60 × 5,310.94
  4. Step 4: Simplify right side
    18,636.86x = 148,438,648.62
  5. Step 5: Solve for x
    x = 148,438,648.62/18,636.86
  6. Step 6: Final answer
    x = 7,964.79

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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.