Home / 3,221.89-4,445.94-2,986.81

Finding the Fourth Proportional to 3,221.89, 4,445.94 and 2,986.81

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Solution

The fourth proportional to 3,221.89, 4,445.94 and 2,986.81 is: 4,121.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,221.89 : 4,445.94 = 2,986.81 : x
  2. Step 2: Convert to fraction form
    3,221.89/4,445.94 = 2,986.81/x
  3. Step 3: Cross multiply
    3,221.89x = 4,445.94 × 2,986.81
  4. Step 4: Simplify right side
    3,221.89x = 13,279,178.05
  5. Step 5: Solve for x
    x = 13,279,178.05/3,221.89
  6. Step 6: Final answer
    x = 4,121.55

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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.