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Finding the Fourth Proportional to 18,635.72, 27,962.96 and 11,613.96

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Solution

The fourth proportional to 18,635.72, 27,962.96 and 11,613.96 is: 17,426.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,635.72 : 27,962.96 = 11,613.96 : x
  2. Step 2: Convert to fraction form
    18,635.72/27,962.96 = 11,613.96/x
  3. Step 3: Cross multiply
    18,635.72x = 27,962.96 × 11,613.96
  4. Step 4: Simplify right side
    18,635.72x = 324,760,640.85
  5. Step 5: Solve for x
    x = 324,760,640.85/18,635.72
  6. Step 6: Final answer
    x = 17,426.79

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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.