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Finding the Fourth Proportional to 19,415,939.20, 29,123,908.80 and 18,219,212.80

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Solution

The fourth proportional to 19,415,939.20, 29,123,908.80 and 18,219,212.80 is: 27,328,819.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,415,939.20 : 29,123,908.80 = 18,219,212.80 : x
  2. Step 2: Convert to fraction form
    19,415,939.20/29,123,908.80 = 18,219,212.80/x
  3. Step 3: Cross multiply
    19,415,939.20x = 29,123,908.80 × 18,219,212.80
  4. Step 4: Simplify right side
    19,415,939.20x = 530,614,691,994,992.69
  5. Step 5: Solve for x
    x = 530,614,691,994,992.69/19,415,939.20
  6. Step 6: Final answer
    x = 27,328,819.20

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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.