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Finding the Fourth Proportional to 12,164.78, 16,786.15 and 8,979.77

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Solution

The fourth proportional to 12,164.78, 16,786.15 and 8,979.77 is: 12,391.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,164.78 : 16,786.15 = 8,979.77 : x
  2. Step 2: Convert to fraction form
    12,164.78/16,786.15 = 8,979.77/x
  3. Step 3: Cross multiply
    12,164.78x = 16,786.15 × 8,979.77
  4. Step 4: Simplify right side
    12,164.78x = 150,735,785.70
  5. Step 5: Solve for x
    x = 150,735,785.70/12,164.78
  6. Step 6: Final answer
    x = 12,391.16

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.