Home / 3,786.88-5,675.28-2,142.40

Finding the Fourth Proportional to 3,786.88, 5,675.28 and 2,142.40

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Solution

The fourth proportional to 3,786.88, 5,675.28 and 2,142.40 is: 3,210.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,786.88 : 5,675.28 = 2,142.40 : x
  2. Step 2: Convert to fraction form
    3,786.88/5,675.28 = 2,142.40/x
  3. Step 3: Cross multiply
    3,786.88x = 5,675.28 × 2,142.40
  4. Step 4: Simplify right side
    3,786.88x = 12,158,719.87
  5. Step 5: Solve for x
    x = 12,158,719.87/3,786.88
  6. Step 6: Final answer
    x = 3,210.75

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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.