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Finding the Fourth Proportional to 11,979,993.60, 17,969,990.40 and 8,200,857.60

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Solution

The fourth proportional to 11,979,993.60, 17,969,990.40 and 8,200,857.60 is: 12,301,286.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,979,993.60 : 17,969,990.40 = 8,200,857.60 : x
  2. Step 2: Convert to fraction form
    11,979,993.60/17,969,990.40 = 8,200,857.60/x
  3. Step 3: Cross multiply
    11,979,993.60x = 17,969,990.40 × 8,200,857.60
  4. Step 4: Simplify right side
    11,979,993.60x = 147,369,332,343,767.03
  5. Step 5: Solve for x
    x = 147,369,332,343,767.03/11,979,993.60
  6. Step 6: Final answer
    x = 12,301,286.40

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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.