Home / 5,489.60-7,575.62-3,131.72

Finding the Fourth Proportional to 5,489.60, 7,575.62 and 3,131.72

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Solution

The fourth proportional to 5,489.60, 7,575.62 and 3,131.72 is: 4,321.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,489.60 : 7,575.62 = 3,131.72 : x
  2. Step 2: Convert to fraction form
    5,489.60/7,575.62 = 3,131.72/x
  3. Step 3: Cross multiply
    5,489.60x = 7,575.62 × 3,131.72
  4. Step 4: Simplify right side
    5,489.60x = 23,724,720.67
  5. Step 5: Solve for x
    x = 23,724,720.67/5,489.60
  6. Step 6: Final answer
    x = 4,321.76

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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.