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Finding the Fourth Proportional to 6,643.44, 9,961.76 and 3,720.96

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Solution

The fourth proportional to 6,643.44, 9,961.76 and 3,720.96 is: 5,579.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,643.44 : 9,961.76 = 3,720.96 : x
  2. Step 2: Convert to fraction form
    6,643.44/9,961.76 = 3,720.96/x
  3. Step 3: Cross multiply
    6,643.44x = 9,961.76 × 3,720.96
  4. Step 4: Simplify right side
    6,643.44x = 37,067,310.49
  5. Step 5: Solve for x
    x = 37,067,310.49/6,643.44
  6. Step 6: Final answer
    x = 5,579.54

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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.