Home / 8,108.20-12,156.40-5,469.15

Finding the Fourth Proportional to 8,108.20, 12,156.40 and 5,469.15

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Solution

The fourth proportional to 8,108.20, 12,156.40 and 5,469.15 is: 8,199.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,108.20 : 12,156.40 = 5,469.15 : x
  2. Step 2: Convert to fraction form
    8,108.20/12,156.40 = 5,469.15/x
  3. Step 3: Cross multiply
    8,108.20x = 12,156.40 × 5,469.15
  4. Step 4: Simplify right side
    8,108.20x = 66,485,175.06
  5. Step 5: Solve for x
    x = 66,485,175.06/8,108.20
  6. Step 6: Final answer
    x = 8,199.75

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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.