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Finding the Fourth Proportional to 7,108.20, 10,662.20 and 3,212.60

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Solution

The fourth proportional to 7,108.20, 10,662.20 and 3,212.60 is: 4,818.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,108.20 : 10,662.20 = 3,212.60 : x
  2. Step 2: Convert to fraction form
    7,108.20/10,662.20 = 3,212.60/x
  3. Step 3: Cross multiply
    7,108.20x = 10,662.20 × 3,212.60
  4. Step 4: Simplify right side
    7,108.20x = 34,253,383.72
  5. Step 5: Solve for x
    x = 34,253,383.72/7,108.20
  6. Step 6: Final answer
    x = 4,818.85

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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.