Home / 3,868.91-5,338.76-2,190.38

Finding the Fourth Proportional to 3,868.91, 5,338.76 and 2,190.38

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Solution

The fourth proportional to 3,868.91, 5,338.76 and 2,190.38 is: 3,022.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,868.91 : 5,338.76 = 2,190.38 : x
  2. Step 2: Convert to fraction form
    3,868.91/5,338.76 = 2,190.38/x
  3. Step 3: Cross multiply
    3,868.91x = 5,338.76 × 2,190.38
  4. Step 4: Simplify right side
    3,868.91x = 11,693,875.48
  5. Step 5: Solve for x
    x = 11,693,875.48/3,868.91
  6. Step 6: Final answer
    x = 3,022.53

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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.