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Finding the Fourth Proportional to 5,739.35, 7,920.02 and 3,221.15

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Solution

The fourth proportional to 5,739.35, 7,920.02 and 3,221.15 is: 4,445.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,739.35 : 7,920.02 = 3,221.15 : x
  2. Step 2: Convert to fraction form
    5,739.35/7,920.02 = 3,221.15/x
  3. Step 3: Cross multiply
    5,739.35x = 7,920.02 × 3,221.15
  4. Step 4: Simplify right side
    5,739.35x = 25,511,540.88
  5. Step 5: Solve for x
    x = 25,511,540.88/5,739.35
  6. Step 6: Final answer
    x = 4,445.03

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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.