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Finding the Fourth Proportional to 7,323.88, 10,979.24 and 2,640.64

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Solution

The fourth proportional to 7,323.88, 10,979.24 and 2,640.64 is: 3,958.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,323.88 : 10,979.24 = 2,640.64 : x
  2. Step 2: Convert to fraction form
    7,323.88/10,979.24 = 2,640.64/x
  3. Step 3: Cross multiply
    7,323.88x = 10,979.24 × 2,640.64
  4. Step 4: Simplify right side
    7,323.88x = 28,992,220.31
  5. Step 5: Solve for x
    x = 28,992,220.31/7,323.88
  6. Step 6: Final answer
    x = 3,958.59

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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.