Home / 3,869.68-5,340.18-2,101.28

Finding the Fourth Proportional to 3,869.68, 5,340.18 and 2,101.28

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Solution

The fourth proportional to 3,869.68, 5,340.18 and 2,101.28 is: 2,899.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.68 : 5,340.18 = 2,101.28 : x
  2. Step 2: Convert to fraction form
    3,869.68/5,340.18 = 2,101.28/x
  3. Step 3: Cross multiply
    3,869.68x = 5,340.18 × 2,101.28
  4. Step 4: Simplify right side
    3,869.68x = 11,221,226.78
  5. Step 5: Solve for x
    x = 11,221,226.78/3,869.68
  6. Step 6: Final answer
    x = 2,899.78

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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.