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Finding the Fourth Proportional to 18,519.72, 27,799.32 and 7,994.88

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Solution

The fourth proportional to 18,519.72, 27,799.32 and 7,994.88 is: 12,000.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,519.72 : 27,799.32 = 7,994.88 : x
  2. Step 2: Convert to fraction form
    18,519.72/27,799.32 = 7,994.88/x
  3. Step 3: Cross multiply
    18,519.72x = 27,799.32 × 7,994.88
  4. Step 4: Simplify right side
    18,519.72x = 222,252,227.48
  5. Step 5: Solve for x
    x = 222,252,227.48/18,519.72
  6. Step 6: Final answer
    x = 12,000.84

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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.