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Finding the Fourth Proportional to 6,620.64, 9,930.96 and 2,720.76

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Solution

The fourth proportional to 6,620.64, 9,930.96 and 2,720.76 is: 4,081.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.64 : 9,930.96 = 2,720.76 : x
  2. Step 2: Convert to fraction form
    6,620.64/9,930.96 = 2,720.76/x
  3. Step 3: Cross multiply
    6,620.64x = 9,930.96 × 2,720.76
  4. Step 4: Simplify right side
    6,620.64x = 27,019,758.73
  5. Step 5: Solve for x
    x = 27,019,758.73/6,620.64
  6. Step 6: Final answer
    x = 4,081.14

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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.