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Finding the Fourth Proportional to 8,190.66, 12,286.80 and 3,259.20

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Solution

The fourth proportional to 8,190.66, 12,286.80 and 3,259.20 is: 4,889.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,190.66 : 12,286.80 = 3,259.20 : x
  2. Step 2: Convert to fraction form
    8,190.66/12,286.80 = 3,259.20/x
  3. Step 3: Cross multiply
    8,190.66x = 12,286.80 × 3,259.20
  4. Step 4: Simplify right side
    8,190.66x = 40,045,138.56
  5. Step 5: Solve for x
    x = 40,045,138.56/8,190.66
  6. Step 6: Final answer
    x = 4,889.12

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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.