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Finding the Fourth Proportional to 8,486.52, 12,722.20 and 3,291.20

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Solution

The fourth proportional to 8,486.52, 12,722.20 and 3,291.20 is: 4,933.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.52 : 12,722.20 = 3,291.20 : x
  2. Step 2: Convert to fraction form
    8,486.52/12,722.20 = 3,291.20/x
  3. Step 3: Cross multiply
    8,486.52x = 12,722.20 × 3,291.20
  4. Step 4: Simplify right side
    8,486.52x = 41,871,304.64
  5. Step 5: Solve for x
    x = 41,871,304.64/8,486.52
  6. Step 6: Final answer
    x = 4,933.86

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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.