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Finding the Fourth Proportional to 5,489.91, 7,571.88 and 3,811.32

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Solution

The fourth proportional to 5,489.91, 7,571.88 and 3,811.32 is: 5,256.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,489.91 : 7,571.88 = 3,811.32 : x
  2. Step 2: Convert to fraction form
    5,489.91/7,571.88 = 3,811.32/x
  3. Step 3: Cross multiply
    5,489.91x = 7,571.88 × 3,811.32
  4. Step 4: Simplify right side
    5,489.91x = 28,858,857.68
  5. Step 5: Solve for x
    x = 28,858,857.68/5,489.91
  6. Step 6: Final answer
    x = 5,256.71

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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.