Home / 3,221.39-4,445.25-2,986.31

Finding the Fourth Proportional to 3,221.39, 4,445.25 and 2,986.31

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Solution

The fourth proportional to 3,221.39, 4,445.25 and 2,986.31 is: 4,120.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,221.39 : 4,445.25 = 2,986.31 : x
  2. Step 2: Convert to fraction form
    3,221.39/4,445.25 = 2,986.31/x
  3. Step 3: Cross multiply
    3,221.39x = 4,445.25 × 2,986.31
  4. Step 4: Simplify right side
    3,221.39x = 13,274,894.53
  5. Step 5: Solve for x
    x = 13,274,894.53/3,221.39
  6. Step 6: Final answer
    x = 4,120.86

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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.