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Finding the Fourth Proportional to 6,620.76, 9,931.68 and 2,238.48

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Solution

The fourth proportional to 6,620.76, 9,931.68 and 2,238.48 is: 3,357.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.76 : 9,931.68 = 2,238.48 : x
  2. Step 2: Convert to fraction form
    6,620.76/9,931.68 = 2,238.48/x
  3. Step 3: Cross multiply
    6,620.76x = 9,931.68 × 2,238.48
  4. Step 4: Simplify right side
    6,620.76x = 22,231,867.05
  5. Step 5: Solve for x
    x = 22,231,867.05/6,620.76
  6. Step 6: Final answer
    x = 3,357.90

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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.