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Finding the Fourth Proportional to 4,489.26, 6,720.21 and 3,913.26

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Solution

The fourth proportional to 4,489.26, 6,720.21 and 3,913.26 is: 5,857.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,489.26 : 6,720.21 = 3,913.26 : x
  2. Step 2: Convert to fraction form
    4,489.26/6,720.21 = 3,913.26/x
  3. Step 3: Cross multiply
    4,489.26x = 6,720.21 × 3,913.26
  4. Step 4: Simplify right side
    4,489.26x = 26,297,928.98
  5. Step 5: Solve for x
    x = 26,297,928.98/4,489.26
  6. Step 6: Final answer
    x = 5,857.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.