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Finding the Fourth Proportional to 18,809,678.40, 28,214,517.60 and 11,597,827.20

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Solution

The fourth proportional to 18,809,678.40, 28,214,517.60 and 11,597,827.20 is: 17,396,740.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809,678.40 : 28,214,517.60 = 11,597,827.20 : x
  2. Step 2: Convert to fraction form
    18,809,678.40/28,214,517.60 = 11,597,827.20/x
  3. Step 3: Cross multiply
    18,809,678.40x = 28,214,517.60 × 11,597,827.20
  4. Step 4: Simplify right side
    18,809,678.40x = 327,227,099,656,158.69
  5. Step 5: Solve for x
    x = 327,227,099,656,158.69/18,809,678.40
  6. Step 6: Final answer
    x = 17,396,740.80

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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.