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Finding the Fourth Proportional to 18,942,858.80, 28,372,297.80 and 11,384,586.80

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Solution

The fourth proportional to 18,942,858.80, 28,372,297.80 and 11,384,586.80 is: 17,051,644.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,942,858.80 : 28,372,297.80 = 11,384,586.80 : x
  2. Step 2: Convert to fraction form
    18,942,858.80/28,372,297.80 = 11,384,586.80/x
  3. Step 3: Cross multiply
    18,942,858.80x = 28,372,297.80 × 11,384,586.80
  4. Step 4: Simplify right side
    18,942,858.80x = 323,006,887,019,549.06
  5. Step 5: Solve for x
    x = 323,006,887,019,549.06/18,942,858.80
  6. Step 6: Final answer
    x = 17,051,644.13

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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.