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Finding the Fourth Proportional to 7,994.90, 11,989.92 and 2,799.56

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Solution

The fourth proportional to 7,994.90, 11,989.92 and 2,799.56 is: 4,198.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,994.90 : 11,989.92 = 2,799.56 : x
  2. Step 2: Convert to fraction form
    7,994.90/11,989.92 = 2,799.56/x
  3. Step 3: Cross multiply
    7,994.90x = 11,989.92 × 2,799.56
  4. Step 4: Simplify right side
    7,994.90x = 33,566,540.91
  5. Step 5: Solve for x
    x = 33,566,540.91/7,994.90
  6. Step 6: Final answer
    x = 4,198.49

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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.