Home / 3,985.20-5,500-2,725.84

Finding the Fourth Proportional to 3,985.20, 5,500 and 2,725.84

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Solution

The fourth proportional to 3,985.20, 5,500 and 2,725.84 is: 3,761.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.20 : 5,500 = 2,725.84 : x
  2. Step 2: Convert to fraction form
    3,985.20/5,500 = 2,725.84/x
  3. Step 3: Cross multiply
    3,985.20x = 5,500 × 2,725.84
  4. Step 4: Simplify right side
    3,985.20x = 14,992,120
  5. Step 5: Solve for x
    x = 14,992,120/3,985.20
  6. Step 6: Final answer
    x = 3,761.95

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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.