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Finding the Fourth Proportional to 18,851.88, 28,321.83 and 17,787.88

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Solution

The fourth proportional to 18,851.88, 28,321.83 and 17,787.88 is: 26,723.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,851.88 : 28,321.83 = 17,787.88 : x
  2. Step 2: Convert to fraction form
    18,851.88/28,321.83 = 17,787.88/x
  3. Step 3: Cross multiply
    18,851.88x = 28,321.83 × 17,787.88
  4. Step 4: Simplify right side
    18,851.88x = 503,785,242.62
  5. Step 5: Solve for x
    x = 503,785,242.62/18,851.88
  6. Step 6: Final answer
    x = 26,723.34

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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.