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Finding the Fourth Proportional to 6,608.13, 9,912.19 and 1,991.13

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Solution

The fourth proportional to 6,608.13, 9,912.19 and 1,991.13 is: 2,986.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,608.13 : 9,912.19 = 1,991.13 : x
  2. Step 2: Convert to fraction form
    6,608.13/9,912.19 = 1,991.13/x
  3. Step 3: Cross multiply
    6,608.13x = 9,912.19 × 1,991.13
  4. Step 4: Simplify right side
    6,608.13x = 19,736,458.87
  5. Step 5: Solve for x
    x = 19,736,458.87/6,608.13
  6. Step 6: Final answer
    x = 2,986.69

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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.