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Finding the Fourth Proportional to 26,911.92, 40,367.92 and 12,868.64

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Solution

The fourth proportional to 26,911.92, 40,367.92 and 12,868.64 is: 19,302.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,911.92 : 40,367.92 = 12,868.64 : x
  2. Step 2: Convert to fraction form
    26,911.92/40,367.92 = 12,868.64/x
  3. Step 3: Cross multiply
    26,911.92x = 40,367.92 × 12,868.64
  4. Step 4: Simplify right side
    26,911.92x = 519,480,230.03
  5. Step 5: Solve for x
    x = 519,480,230.03/26,911.92
  6. Step 6: Final answer
    x = 19,302.98

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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.