Home / 3,985.97-5,496.81-2,639.43

Finding the Fourth Proportional to 3,985.97, 5,496.81 and 2,639.43

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Solution

The fourth proportional to 3,985.97, 5,496.81 and 2,639.43 is: 3,639.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.97 : 5,496.81 = 2,639.43 : x
  2. Step 2: Convert to fraction form
    3,985.97/5,496.81 = 2,639.43/x
  3. Step 3: Cross multiply
    3,985.97x = 5,496.81 × 2,639.43
  4. Step 4: Simplify right side
    3,985.97x = 14,508,445.22
  5. Step 5: Solve for x
    x = 14,508,445.22/3,985.97
  6. Step 6: Final answer
    x = 3,639.88

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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.