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Finding the Fourth Proportional to 6,613.20, 9,917.40 and 2,230.80

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Solution

The fourth proportional to 6,613.20, 9,917.40 and 2,230.80 is: 3,345.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,613.20 : 9,917.40 = 2,230.80 : x
  2. Step 2: Convert to fraction form
    6,613.20/9,917.40 = 2,230.80/x
  3. Step 3: Cross multiply
    6,613.20x = 9,917.40 × 2,230.80
  4. Step 4: Simplify right side
    6,613.20x = 22,123,735.92
  5. Step 5: Solve for x
    x = 22,123,735.92/6,613.20
  6. Step 6: Final answer
    x = 3,345.39

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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.