Home / 2,781.81-3,836.97-1,896.12

Finding the Fourth Proportional to 2,781.81, 3,836.97 and 1,896.12

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Solution

The fourth proportional to 2,781.81, 3,836.97 and 1,896.12 is: 2,615.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.81 : 3,836.97 = 1,896.12 : x
  2. Step 2: Convert to fraction form
    2,781.81/3,836.97 = 1,896.12/x
  3. Step 3: Cross multiply
    2,781.81x = 3,836.97 × 1,896.12
  4. Step 4: Simplify right side
    2,781.81x = 7,275,355.56
  5. Step 5: Solve for x
    x = 7,275,355.56/2,781.81
  6. Step 6: Final answer
    x = 2,615.33

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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.