Home / 3,987.71-5,497.34-2,805.11

Finding the Fourth Proportional to 3,987.71, 5,497.34 and 2,805.11

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Solution

The fourth proportional to 3,987.71, 5,497.34 and 2,805.11 is: 3,867.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.71 : 5,497.34 = 2,805.11 : x
  2. Step 2: Convert to fraction form
    3,987.71/5,497.34 = 2,805.11/x
  3. Step 3: Cross multiply
    3,987.71x = 5,497.34 × 2,805.11
  4. Step 4: Simplify right side
    3,987.71x = 15,420,669.21
  5. Step 5: Solve for x
    x = 15,420,669.21/3,987.71
  6. Step 6: Final answer
    x = 3,867.04

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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.