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Finding the Fourth Proportional to 8,321.67, 12,486.44 and 4,162.12

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Solution

The fourth proportional to 8,321.67, 12,486.44 and 4,162.12 is: 6,245.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,321.67 : 12,486.44 = 4,162.12 : x
  2. Step 2: Convert to fraction form
    8,321.67/12,486.44 = 4,162.12/x
  3. Step 3: Cross multiply
    8,321.67x = 12,486.44 × 4,162.12
  4. Step 4: Simplify right side
    8,321.67x = 51,970,040.84
  5. Step 5: Solve for x
    x = 51,970,040.84/8,321.67
  6. Step 6: Final answer
    x = 6,245.15

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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.