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Finding the Fourth Proportional to 21,794, 30,076.36 and 11,858.64

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Solution

The fourth proportional to 21,794, 30,076.36 and 11,858.64 is: 16,365.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,794 : 30,076.36 = 11,858.64 : x
  2. Step 2: Convert to fraction form
    21,794/30,076.36 = 11,858.64/x
  3. Step 3: Cross multiply
    21,794x = 30,076.36 × 11,858.64
  4. Step 4: Simplify right side
    21,794x = 356,664,725.75
  5. Step 5: Solve for x
    x = 356,664,725.75/21,794
  6. Step 6: Final answer
    x = 16,365.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.