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Finding the Fourth Proportional to 8,319.74, 12,479.37 and 2,163.74

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Solution

The fourth proportional to 8,319.74, 12,479.37 and 2,163.74 is: 3,245.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,319.74 : 12,479.37 = 2,163.74 : x
  2. Step 2: Convert to fraction form
    8,319.74/12,479.37 = 2,163.74/x
  3. Step 3: Cross multiply
    8,319.74x = 12,479.37 × 2,163.74
  4. Step 4: Simplify right side
    8,319.74x = 27,002,112.04
  5. Step 5: Solve for x
    x = 27,002,112.04/8,319.74
  6. Step 6: Final answer
    x = 3,245.55

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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.