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Finding the Fourth Proportional to 3,891.57, 5,356.74 and 3,393.33

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Solution

The fourth proportional to 3,891.57, 5,356.74 and 3,393.33 is: 4,670.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.57 : 5,356.74 = 3,393.33 : x
  2. Step 2: Convert to fraction form
    3,891.57/5,356.74 = 3,393.33/x
  3. Step 3: Cross multiply
    3,891.57x = 5,356.74 × 3,393.33
  4. Step 4: Simplify right side
    3,891.57x = 18,177,186.54
  5. Step 5: Solve for x
    x = 18,177,186.54/3,891.57
  6. Step 6: Final answer
    x = 4,670.91

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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.