Home / 5,408.40-8,122.20-3,949.20

Finding the Fourth Proportional to 5,408.40, 8,122.20 and 3,949.20

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Solution

The fourth proportional to 5,408.40, 8,122.20 and 3,949.20 is: 5,930.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,408.40 : 8,122.20 = 3,949.20 : x
  2. Step 2: Convert to fraction form
    5,408.40/8,122.20 = 3,949.20/x
  3. Step 3: Cross multiply
    5,408.40x = 8,122.20 × 3,949.20
  4. Step 4: Simplify right side
    5,408.40x = 32,076,192.24
  5. Step 5: Solve for x
    x = 32,076,192.24/5,408.40
  6. Step 6: Final answer
    x = 5,930.81

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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.