Home / 2,661.68-3,987.12-1,361.36

Finding the Fourth Proportional to 2,661.68, 3,987.12 and 1,361.36

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Solution

The fourth proportional to 2,661.68, 3,987.12 and 1,361.36 is: 2,039.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661.68 : 3,987.12 = 1,361.36 : x
  2. Step 2: Convert to fraction form
    2,661.68/3,987.12 = 1,361.36/x
  3. Step 3: Cross multiply
    2,661.68x = 3,987.12 × 1,361.36
  4. Step 4: Simplify right side
    2,661.68x = 5,427,905.68
  5. Step 5: Solve for x
    x = 5,427,905.68/2,661.68
  6. Step 6: Final answer
    x = 2,039.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.