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Finding the Fourth Proportional to 57,876, 86,813.79 and 18,436.29

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Solution

The fourth proportional to 57,876, 86,813.79 and 18,436.29 is: 27,654.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,876 : 86,813.79 = 18,436.29 : x
  2. Step 2: Convert to fraction form
    57,876/86,813.79 = 18,436.29/x
  3. Step 3: Cross multiply
    57,876x = 86,813.79 × 18,436.29
  4. Step 4: Simplify right side
    57,876x = 1,600,524,208.44
  5. Step 5: Solve for x
    x = 1,600,524,208.44/57,876
  6. Step 6: Final answer
    x = 27,654.37

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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.