Home / 3,781.44-5,218.09-2,102.72

Finding the Fourth Proportional to 3,781.44, 5,218.09 and 2,102.72

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Solution

The fourth proportional to 3,781.44, 5,218.09 and 2,102.72 is: 2,901.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.44 : 5,218.09 = 2,102.72 : x
  2. Step 2: Convert to fraction form
    3,781.44/5,218.09 = 2,102.72/x
  3. Step 3: Cross multiply
    3,781.44x = 5,218.09 × 2,102.72
  4. Step 4: Simplify right side
    3,781.44x = 10,972,145.60
  5. Step 5: Solve for x
    x = 10,972,145.60/3,781.44
  6. Step 6: Final answer
    x = 2,901.58

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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.