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Finding the Fourth Proportional to 18,885,745.60, 28,370,608.80 and 18,171,908.80

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Solution

The fourth proportional to 18,885,745.60, 28,370,608.80 and 18,171,908.80 is: 27,298,266.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,885,745.60 : 28,370,608.80 = 18,171,908.80 : x
  2. Step 2: Convert to fraction form
    18,885,745.60/28,370,608.80 = 18,171,908.80/x
  3. Step 3: Cross multiply
    18,885,745.60x = 28,370,608.80 × 18,171,908.80
  4. Step 4: Simplify right side
    18,885,745.60x = 515,548,115,714,077.50
  5. Step 5: Solve for x
    x = 515,548,115,714,077.50/18,885,745.60
  6. Step 6: Final answer
    x = 27,298,266.46

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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.