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Finding the Fourth Proportional to 18,446,764.80, 27,678,020.40 and 8,857,207.20

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Solution

The fourth proportional to 18,446,764.80, 27,678,020.40 and 8,857,207.20 is: 13,289,591.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,446,764.80 : 27,678,020.40 = 8,857,207.20 : x
  2. Step 2: Convert to fraction form
    18,446,764.80/27,678,020.40 = 8,857,207.20/x
  3. Step 3: Cross multiply
    18,446,764.80x = 27,678,020.40 × 8,857,207.20
  4. Step 4: Simplify right side
    18,446,764.80x = 245,149,961,568,626.84
  5. Step 5: Solve for x
    x = 245,149,961,568,626.84/18,446,764.80
  6. Step 6: Final answer
    x = 13,289,591.11

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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.