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Finding the Fourth Proportional to 18,468,005.20, 27,702,007.80 and 18,090,091.60

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Solution

The fourth proportional to 18,468,005.20, 27,702,007.80 and 18,090,091.60 is: 27,135,137.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,468,005.20 : 27,702,007.80 = 18,090,091.60 : x
  2. Step 2: Convert to fraction form
    18,468,005.20/27,702,007.80 = 18,090,091.60/x
  3. Step 3: Cross multiply
    18,468,005.20x = 27,702,007.80 × 18,090,091.60
  4. Step 4: Simplify right side
    18,468,005.20x = 501,131,858,605,914.56
  5. Step 5: Solve for x
    x = 501,131,858,605,914.56/18,468,005.20
  6. Step 6: Final answer
    x = 27,135,137.40

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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.