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Finding the Fourth Proportional to 18,662.42, 27,986.33 and 8,266.88

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Solution

The fourth proportional to 18,662.42, 27,986.33 and 8,266.88 is: 12,397.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,662.42 : 27,986.33 = 8,266.88 : x
  2. Step 2: Convert to fraction form
    18,662.42/27,986.33 = 8,266.88/x
  3. Step 3: Cross multiply
    18,662.42x = 27,986.33 × 8,266.88
  4. Step 4: Simplify right side
    18,662.42x = 231,359,450.48
  5. Step 5: Solve for x
    x = 231,359,450.48/18,662.42
  6. Step 6: Final answer
    x = 12,397.08

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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.