Home / 3,872.21-5,343.72-2,103.92

Finding the Fourth Proportional to 3,872.21, 5,343.72 and 2,103.92

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Solution

The fourth proportional to 3,872.21, 5,343.72 and 2,103.92 is: 2,903.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,872.21 : 5,343.72 = 2,103.92 : x
  2. Step 2: Convert to fraction form
    3,872.21/5,343.72 = 2,103.92/x
  3. Step 3: Cross multiply
    3,872.21x = 5,343.72 × 2,103.92
  4. Step 4: Simplify right side
    3,872.21x = 11,242,786.71
  5. Step 5: Solve for x
    x = 11,242,786.71/3,872.21
  6. Step 6: Final answer
    x = 2,903.46

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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.