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Finding the Fourth Proportional to 6,651.72, 9,979.84 and 4,183.64

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Solution

The fourth proportional to 6,651.72, 9,979.84 and 4,183.64 is: 6,276.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,651.72 : 9,979.84 = 4,183.64 : x
  2. Step 2: Convert to fraction form
    6,651.72/9,979.84 = 4,183.64/x
  3. Step 3: Cross multiply
    6,651.72x = 9,979.84 × 4,183.64
  4. Step 4: Simplify right side
    6,651.72x = 41,752,057.82
  5. Step 5: Solve for x
    x = 41,752,057.82/6,651.72
  6. Step 6: Final answer
    x = 6,276.88

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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.