Home / 3,116.97-4,301.09-1,921.78

Finding the Fourth Proportional to 3,116.97, 4,301.09 and 1,921.78

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Solution

The fourth proportional to 3,116.97, 4,301.09 and 1,921.78 is: 2,651.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,116.97 : 4,301.09 = 1,921.78 : x
  2. Step 2: Convert to fraction form
    3,116.97/4,301.09 = 1,921.78/x
  3. Step 3: Cross multiply
    3,116.97x = 4,301.09 × 1,921.78
  4. Step 4: Simplify right side
    3,116.97x = 8,265,742.79
  5. Step 5: Solve for x
    x = 8,265,742.79/3,116.97
  6. Step 6: Final answer
    x = 2,651.85

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1.5x scale

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.