Home / 2,686.38-3,711.90-2,219.82

Finding the Fourth Proportional to 2,686.38, 3,711.90 and 2,219.82

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Solution

The fourth proportional to 2,686.38, 3,711.90 and 2,219.82 is: 3,067.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.38 : 3,711.90 = 2,219.82 : x
  2. Step 2: Convert to fraction form
    2,686.38/3,711.90 = 2,219.82/x
  3. Step 3: Cross multiply
    2,686.38x = 3,711.90 × 2,219.82
  4. Step 4: Simplify right side
    2,686.38x = 8,239,749.86
  5. Step 5: Solve for x
    x = 8,239,749.86/2,686.38
  6. Step 6: Final answer
    x = 3,067.23

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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.