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Finding the Fourth Proportional to 5,540.86, 8,321.19 and 5,317.88

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Solution

The fourth proportional to 5,540.86, 8,321.19 and 5,317.88 is: 7,986.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,540.86 : 8,321.19 = 5,317.88 : x
  2. Step 2: Convert to fraction form
    5,540.86/8,321.19 = 5,317.88/x
  3. Step 3: Cross multiply
    5,540.86x = 8,321.19 × 5,317.88
  4. Step 4: Simplify right side
    5,540.86x = 44,251,089.88
  5. Step 5: Solve for x
    x = 44,251,089.88/5,540.86
  6. Step 6: Final answer
    x = 7,986.33

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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.