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Finding the Fourth Proportional to 8,319.81, 12,481.70 and 2,773.20

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Solution

The fourth proportional to 8,319.81, 12,481.70 and 2,773.20 is: 4,160.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,319.81 : 12,481.70 = 2,773.20 : x
  2. Step 2: Convert to fraction form
    8,319.81/12,481.70 = 2,773.20/x
  3. Step 3: Cross multiply
    8,319.81x = 12,481.70 × 2,773.20
  4. Step 4: Simplify right side
    8,319.81x = 34,614,250.44
  5. Step 5: Solve for x
    x = 34,614,250.44/8,319.81
  6. Step 6: Final answer
    x = 4,160.46

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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.