Home / 8,102.72-12,156.12-3,423.90

Finding the Fourth Proportional to 8,102.72, 12,156.12 and 3,423.90

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Solution

The fourth proportional to 8,102.72, 12,156.12 and 3,423.90 is: 5,136.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,102.72 : 12,156.12 = 3,423.90 : x
  2. Step 2: Convert to fraction form
    8,102.72/12,156.12 = 3,423.90/x
  3. Step 3: Cross multiply
    8,102.72x = 12,156.12 × 3,423.90
  4. Step 4: Simplify right side
    8,102.72x = 41,621,339.27
  5. Step 5: Solve for x
    x = 41,621,339.27/8,102.72
  6. Step 6: Final answer
    x = 5,136.72

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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.