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Finding the Fourth Proportional to 5,489.48, 7,575.96 and 3,131.48

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Solution

The fourth proportional to 5,489.48, 7,575.96 and 3,131.48 is: 4,321.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,489.48 : 7,575.96 = 3,131.48 : x
  2. Step 2: Convert to fraction form
    5,489.48/7,575.96 = 3,131.48/x
  3. Step 3: Cross multiply
    5,489.48x = 7,575.96 × 3,131.48
  4. Step 4: Simplify right side
    5,489.48x = 23,723,967.22
  5. Step 5: Solve for x
    x = 23,723,967.22/5,489.48
  6. Step 6: Final answer
    x = 4,321.71

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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.