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Finding the Fourth Proportional to 18,521.99, 27,787.23 and 5,375.42

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Solution

The fourth proportional to 18,521.99, 27,787.23 and 5,375.42 is: 8,064.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,521.99 : 27,787.23 = 5,375.42 : x
  2. Step 2: Convert to fraction form
    18,521.99/27,787.23 = 5,375.42/x
  3. Step 3: Cross multiply
    18,521.99x = 27,787.23 × 5,375.42
  4. Step 4: Simplify right side
    18,521.99x = 149,367,892.95
  5. Step 5: Solve for x
    x = 149,367,892.95/18,521.99
  6. Step 6: Final answer
    x = 8,064.36

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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.