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Finding the Fourth Proportional to 12,095,918.20, 18,143,877.30 and 11,172,129.40

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Solution

The fourth proportional to 12,095,918.20, 18,143,877.30 and 11,172,129.40 is: 16,758,194.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,095,918.20 : 18,143,877.30 = 11,172,129.40 : x
  2. Step 2: Convert to fraction form
    12,095,918.20/18,143,877.30 = 11,172,129.40/x
  3. Step 3: Cross multiply
    12,095,918.20x = 18,143,877.30 × 11,172,129.40
  4. Step 4: Simplify right side
    12,095,918.20x = 202,705,745,013,322.62
  5. Step 5: Solve for x
    x = 202,705,745,013,322.62/12,095,918.20
  6. Step 6: Final answer
    x = 16,758,194.10

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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.