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Finding the Fourth Proportional to 18,694.88, 25,790.32 and 11,977.28

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Solution

The fourth proportional to 18,694.88, 25,790.32 and 11,977.28 is: 16,523.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,694.88 : 25,790.32 = 11,977.28 : x
  2. Step 2: Convert to fraction form
    18,694.88/25,790.32 = 11,977.28/x
  3. Step 3: Cross multiply
    18,694.88x = 25,790.32 × 11,977.28
  4. Step 4: Simplify right side
    18,694.88x = 308,897,883.93
  5. Step 5: Solve for x
    x = 308,897,883.93/18,694.88
  6. Step 6: Final answer
    x = 16,523.13

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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.