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Finding the Fourth Proportional to 26,979.90, 40,469.85 and 8,511.90

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Solution

The fourth proportional to 26,979.90, 40,469.85 and 8,511.90 is: 12,767.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,979.90 : 40,469.85 = 8,511.90 : x
  2. Step 2: Convert to fraction form
    26,979.90/40,469.85 = 8,511.90/x
  3. Step 3: Cross multiply
    26,979.90x = 40,469.85 × 8,511.90
  4. Step 4: Simplify right side
    26,979.90x = 344,475,316.22
  5. Step 5: Solve for x
    x = 344,475,316.22/26,979.90
  6. Step 6: Final answer
    x = 12,767.85

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1.5x scale

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.