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Finding the Fourth Proportional to 36,680, 55,020 and 8,978

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Solution

The fourth proportional to 36,680, 55,020 and 8,978 is: 13,467

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,680 : 55,020 = 8,978 : x
  2. Step 2: Convert to fraction form
    36,680/55,020 = 8,978/x
  3. Step 3: Cross multiply
    36,680x = 55,020 × 8,978
  4. Step 4: Simplify right side
    36,680x = 493,969,560
  5. Step 5: Solve for x
    x = 493,969,560/36,680
  6. Step 6: Final answer
    x = 13,467

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.