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Finding the Fourth Proportional to 6,515.91, 8,993.16 and 3,721.41

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Solution

The fourth proportional to 6,515.91, 8,993.16 and 3,721.41 is: 5,136.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,515.91 : 8,993.16 = 3,721.41 : x
  2. Step 2: Convert to fraction form
    6,515.91/8,993.16 = 3,721.41/x
  3. Step 3: Cross multiply
    6,515.91x = 8,993.16 × 3,721.41
  4. Step 4: Simplify right side
    6,515.91x = 33,467,235.56
  5. Step 5: Solve for x
    x = 33,467,235.56/6,515.91
  6. Step 6: Final answer
    x = 5,136.23

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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.