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Finding the Fourth Proportional to 7,999.80, 11,994.30 and 4,252.20

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Solution

The fourth proportional to 7,999.80, 11,994.30 and 4,252.20 is: 6,375.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,999.80 : 11,994.30 = 4,252.20 : x
  2. Step 2: Convert to fraction form
    7,999.80/11,994.30 = 4,252.20/x
  3. Step 3: Cross multiply
    7,999.80x = 11,994.30 × 4,252.20
  4. Step 4: Simplify right side
    7,999.80x = 51,002,162.46
  5. Step 5: Solve for x
    x = 51,002,162.46/7,999.80
  6. Step 6: Final answer
    x = 6,375.43

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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.