Home / 3,924.22-5,415.49-2,131.70

Finding the Fourth Proportional to 3,924.22, 5,415.49 and 2,131.70

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Solution

The fourth proportional to 3,924.22, 5,415.49 and 2,131.70 is: 2,941.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,924.22 : 5,415.49 = 2,131.70 : x
  2. Step 2: Convert to fraction form
    3,924.22/5,415.49 = 2,131.70/x
  3. Step 3: Cross multiply
    3,924.22x = 5,415.49 × 2,131.70
  4. Step 4: Simplify right side
    3,924.22x = 11,544,172.96
  5. Step 5: Solve for x
    x = 11,544,172.96/3,924.22
  6. Step 6: Final answer
    x = 2,941.78

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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.