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Finding the Fourth Proportional to 6,722.73, 9,279.23 and 3,928.77

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Solution

The fourth proportional to 6,722.73, 9,279.23 and 3,928.77 is: 5,422.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,722.73 : 9,279.23 = 3,928.77 : x
  2. Step 2: Convert to fraction form
    6,722.73/9,279.23 = 3,928.77/x
  3. Step 3: Cross multiply
    6,722.73x = 9,279.23 × 3,928.77
  4. Step 4: Simplify right side
    6,722.73x = 36,455,940.80
  5. Step 5: Solve for x
    x = 36,455,940.80/6,722.73
  6. Step 6: Final answer
    x = 5,422.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.