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Finding the Fourth Proportional to 18,644.51, 27,978.56 and 16,893.09

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Solution

The fourth proportional to 18,644.51, 27,978.56 and 16,893.09 is: 25,350.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,644.51 : 27,978.56 = 16,893.09 : x
  2. Step 2: Convert to fraction form
    18,644.51/27,978.56 = 16,893.09/x
  3. Step 3: Cross multiply
    18,644.51x = 27,978.56 × 16,893.09
  4. Step 4: Simplify right side
    18,644.51x = 472,644,107.79
  5. Step 5: Solve for x
    x = 472,644,107.79/18,644.51
  6. Step 6: Final answer
    x = 25,350.32

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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.