Home / 3,868.28-5,338.18-2,189.68

Finding the Fourth Proportional to 3,868.28, 5,338.18 and 2,189.68

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Solution

The fourth proportional to 3,868.28, 5,338.18 and 2,189.68 is: 3,021.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,868.28 : 5,338.18 = 2,189.68 : x
  2. Step 2: Convert to fraction form
    3,868.28/5,338.18 = 2,189.68/x
  3. Step 3: Cross multiply
    3,868.28x = 5,338.18 × 2,189.68
  4. Step 4: Simplify right side
    3,868.28x = 11,688,919.24
  5. Step 5: Solve for x
    x = 11,688,919.24/3,868.28
  6. Step 6: Final answer
    x = 3,021.73

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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.