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Finding the Fourth Proportional to 6,613.67, 9,920.21 and 2,231.10

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Solution

The fourth proportional to 6,613.67, 9,920.21 and 2,231.10 is: 3,346.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,613.67 : 9,920.21 = 2,231.10 : x
  2. Step 2: Convert to fraction form
    6,613.67/9,920.21 = 2,231.10/x
  3. Step 3: Cross multiply
    6,613.67x = 9,920.21 × 2,231.10
  4. Step 4: Simplify right side
    6,613.67x = 22,132,969.38
  5. Step 5: Solve for x
    x = 22,132,969.38/6,613.67
  6. Step 6: Final answer
    x = 3,346.55

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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.