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Finding the Fourth Proportional to 26,857.80, 40,286.67 and 8,389.80

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Solution

The fourth proportional to 26,857.80, 40,286.67 and 8,389.80 is: 12,584.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,857.80 : 40,286.67 = 8,389.80 : x
  2. Step 2: Convert to fraction form
    26,857.80/40,286.67 = 8,389.80/x
  3. Step 3: Cross multiply
    26,857.80x = 40,286.67 × 8,389.80
  4. Step 4: Simplify right side
    26,857.80x = 337,997,103.97
  5. Step 5: Solve for x
    x = 337,997,103.97/26,857.80
  6. Step 6: Final answer
    x = 12,584.69

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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.