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Finding the Fourth Proportional to 18,668.78, 27,938.73 and 11,550.09

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Solution

The fourth proportional to 18,668.78, 27,938.73 and 11,550.09 is: 17,285.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.78 : 27,938.73 = 11,550.09 : x
  2. Step 2: Convert to fraction form
    18,668.78/27,938.73 = 11,550.09/x
  3. Step 3: Cross multiply
    18,668.78x = 27,938.73 × 11,550.09
  4. Step 4: Simplify right side
    18,668.78x = 322,694,845.99
  5. Step 5: Solve for x
    x = 322,694,845.99/18,668.78
  6. Step 6: Final answer
    x = 17,285.27

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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.