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Finding the Fourth Proportional to 6,639.98, 9,956.79 and 3,867.44

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Solution

The fourth proportional to 6,639.98, 9,956.79 and 3,867.44 is: 5,799.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.98 : 9,956.79 = 3,867.44 : x
  2. Step 2: Convert to fraction form
    6,639.98/9,956.79 = 3,867.44/x
  3. Step 3: Cross multiply
    6,639.98x = 9,956.79 × 3,867.44
  4. Step 4: Simplify right side
    6,639.98x = 38,507,238.13
  5. Step 5: Solve for x
    x = 38,507,238.13/6,639.98
  6. Step 6: Final answer
    x = 5,799.30

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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.