Home / 3,116.12-4,674.30-2,139.80

Finding the Fourth Proportional to 3,116.12, 4,674.30 and 2,139.80

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Solution

The fourth proportional to 3,116.12, 4,674.30 and 2,139.80 is: 3,209.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,116.12 : 4,674.30 = 2,139.80 : x
  2. Step 2: Convert to fraction form
    3,116.12/4,674.30 = 2,139.80/x
  3. Step 3: Cross multiply
    3,116.12x = 4,674.30 × 2,139.80
  4. Step 4: Simplify right side
    3,116.12x = 10,002,067.14
  5. Step 5: Solve for x
    x = 10,002,067.14/3,116.12
  6. Step 6: Final answer
    x = 3,209.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.