Home / 2,786.46-3,846.68-2,155.56

Finding the Fourth Proportional to 2,786.46, 3,846.68 and 2,155.56

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Solution

The fourth proportional to 2,786.46, 3,846.68 and 2,155.56 is: 2,975.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,786.46 : 3,846.68 = 2,155.56 : x
  2. Step 2: Convert to fraction form
    2,786.46/3,846.68 = 2,155.56/x
  3. Step 3: Cross multiply
    2,786.46x = 3,846.68 × 2,155.56
  4. Step 4: Simplify right side
    2,786.46x = 8,291,749.54
  5. Step 5: Solve for x
    x = 8,291,749.54/2,786.46
  6. Step 6: Final answer
    x = 2,975.73

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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.