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Finding the Fourth Proportional to 6,620.60, 9,930.67 and 3,108.64

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Solution

The fourth proportional to 6,620.60, 9,930.67 and 3,108.64 is: 4,662.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.60 : 9,930.67 = 3,108.64 : x
  2. Step 2: Convert to fraction form
    6,620.60/9,930.67 = 3,108.64/x
  3. Step 3: Cross multiply
    6,620.60x = 9,930.67 × 3,108.64
  4. Step 4: Simplify right side
    6,620.60x = 30,870,845.39
  5. Step 5: Solve for x
    x = 30,870,845.39/6,620.60
  6. Step 6: Final answer
    x = 4,662.85

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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.