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Finding the Fourth Proportional to 18,348.27, 27,518.16 and 8,978.88

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Solution

The fourth proportional to 18,348.27, 27,518.16 and 8,978.88 is: 13,466.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,348.27 : 27,518.16 = 8,978.88 : x
  2. Step 2: Convert to fraction form
    18,348.27/27,518.16 = 8,978.88/x
  3. Step 3: Cross multiply
    18,348.27x = 27,518.16 × 8,978.88
  4. Step 4: Simplify right side
    18,348.27x = 247,082,085.38
  5. Step 5: Solve for x
    x = 247,082,085.38/18,348.27
  6. Step 6: Final answer
    x = 13,466.23

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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.