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Finding the Fourth Proportional to 18,083.88, 27,107.10 and 6,987.78

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Solution

The fourth proportional to 18,083.88, 27,107.10 and 6,987.78 is: 10,474.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,083.88 : 27,107.10 = 6,987.78 : x
  2. Step 2: Convert to fraction form
    18,083.88/27,107.10 = 6,987.78/x
  3. Step 3: Cross multiply
    18,083.88x = 27,107.10 × 6,987.78
  4. Step 4: Simplify right side
    18,083.88x = 189,418,451.24
  5. Step 5: Solve for x
    x = 189,418,451.24/18,083.88
  6. Step 6: Final answer
    x = 10,474.44

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1.5x scale

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.