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Finding the Fourth Proportional to 26,659, 39,956.68 and 12,408.30

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Solution

The fourth proportional to 26,659, 39,956.68 and 12,408.30 is: 18,597.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,659 : 39,956.68 = 12,408.30 : x
  2. Step 2: Convert to fraction form
    26,659/39,956.68 = 12,408.30/x
  3. Step 3: Cross multiply
    26,659x = 39,956.68 × 12,408.30
  4. Step 4: Simplify right side
    26,659x = 495,794,472.44
  5. Step 5: Solve for x
    x = 495,794,472.44/26,659
  6. Step 6: Final answer
    x = 18,597.64

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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.