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Finding the Fourth Proportional to 12,408.26, 18,615.12 and 6,869.68

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Solution

The fourth proportional to 12,408.26, 18,615.12 and 6,869.68 is: 10,306.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,408.26 : 18,615.12 = 6,869.68 : x
  2. Step 2: Convert to fraction form
    12,408.26/18,615.12 = 6,869.68/x
  3. Step 3: Cross multiply
    12,408.26x = 18,615.12 × 6,869.68
  4. Step 4: Simplify right side
    12,408.26x = 127,879,917.56
  5. Step 5: Solve for x
    x = 127,879,917.56/12,408.26
  6. Step 6: Final answer
    x = 10,306.03

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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.