Home / 8,241.20-12,359.40-3,309.20

Finding the Fourth Proportional to 8,241.20, 12,359.40 and 3,309.20

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Solution

The fourth proportional to 8,241.20, 12,359.40 and 3,309.20 is: 4,962.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,241.20 : 12,359.40 = 3,309.20 : x
  2. Step 2: Convert to fraction form
    8,241.20/12,359.40 = 3,309.20/x
  3. Step 3: Cross multiply
    8,241.20x = 12,359.40 × 3,309.20
  4. Step 4: Simplify right side
    8,241.20x = 40,899,726.48
  5. Step 5: Solve for x
    x = 40,899,726.48/8,241.20
  6. Step 6: Final answer
    x = 4,962.84

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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.