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Finding the Fourth Proportional to 6,920.39, 9,550.09 and 3,936.23

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Solution

The fourth proportional to 6,920.39, 9,550.09 and 3,936.23 is: 5,431.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,920.39 : 9,550.09 = 3,936.23 : x
  2. Step 2: Convert to fraction form
    6,920.39/9,550.09 = 3,936.23/x
  3. Step 3: Cross multiply
    6,920.39x = 9,550.09 × 3,936.23
  4. Step 4: Simplify right side
    6,920.39x = 37,591,293.17
  5. Step 5: Solve for x
    x = 37,591,293.17/6,920.39
  6. Step 6: Final answer
    x = 5,431.96

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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.