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Finding the Fourth Proportional to 6,608.78, 9,913.17 and 3,321.09

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Solution

The fourth proportional to 6,608.78, 9,913.17 and 3,321.09 is: 4,981.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,608.78 : 9,913.17 = 3,321.09 : x
  2. Step 2: Convert to fraction form
    6,608.78/9,913.17 = 3,321.09/x
  3. Step 3: Cross multiply
    6,608.78x = 9,913.17 × 3,321.09
  4. Step 4: Simplify right side
    6,608.78x = 32,922,529.76
  5. Step 5: Solve for x
    x = 32,922,529.76/6,608.78
  6. Step 6: Final answer
    x = 4,981.64

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Double scale
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Similar ratio
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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.