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Finding the Fourth Proportional to 18,418.46, 27,627 and 5,270.80

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Solution

The fourth proportional to 18,418.46, 27,627 and 5,270.80 is: 7,906.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,418.46 : 27,627 = 5,270.80 : x
  2. Step 2: Convert to fraction form
    18,418.46/27,627 = 5,270.80/x
  3. Step 3: Cross multiply
    18,418.46x = 27,627 × 5,270.80
  4. Step 4: Simplify right side
    18,418.46x = 145,616,391.60
  5. Step 5: Solve for x
    x = 145,616,391.60/18,418.46
  6. Step 6: Final answer
    x = 7,906.00

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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.