Home / 3,758.88-5,186.72-2,165.28

Finding the Fourth Proportional to 3,758.88, 5,186.72 and 2,165.28

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Solution

The fourth proportional to 3,758.88, 5,186.72 and 2,165.28 is: 2,987.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,758.88 : 5,186.72 = 2,165.28 : x
  2. Step 2: Convert to fraction form
    3,758.88/5,186.72 = 2,165.28/x
  3. Step 3: Cross multiply
    3,758.88x = 5,186.72 × 2,165.28
  4. Step 4: Simplify right side
    3,758.88x = 11,230,701.08
  5. Step 5: Solve for x
    x = 11,230,701.08/3,758.88
  6. Step 6: Final answer
    x = 2,987.78

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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.