Home / 3,781.32-5,218.68-2,896.80

Finding the Fourth Proportional to 3,781.32, 5,218.68 and 2,896.80

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Solution

The fourth proportional to 3,781.32, 5,218.68 and 2,896.80 is: 3,997.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.32 : 5,218.68 = 2,896.80 : x
  2. Step 2: Convert to fraction form
    3,781.32/5,218.68 = 2,896.80/x
  3. Step 3: Cross multiply
    3,781.32x = 5,218.68 × 2,896.80
  4. Step 4: Simplify right side
    3,781.32x = 15,117,472.22
  5. Step 5: Solve for x
    x = 15,117,472.22/3,781.32
  6. Step 6: Final answer
    x = 3,997.94

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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.