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Finding the Fourth Proportional to 8,408.67, 12,609.09 and 2,860.52

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Solution

The fourth proportional to 8,408.67, 12,609.09 and 2,860.52 is: 4,289.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,408.67 : 12,609.09 = 2,860.52 : x
  2. Step 2: Convert to fraction form
    8,408.67/12,609.09 = 2,860.52/x
  3. Step 3: Cross multiply
    8,408.67x = 12,609.09 × 2,860.52
  4. Step 4: Simplify right side
    8,408.67x = 36,068,491.08
  5. Step 5: Solve for x
    x = 36,068,491.08/8,408.67
  6. Step 6: Final answer
    x = 4,289.44

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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.