Home / 3,869.59-5,340.14-2,101.31

Finding the Fourth Proportional to 3,869.59, 5,340.14 and 2,101.31

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Solution

The fourth proportional to 3,869.59, 5,340.14 and 2,101.31 is: 2,899.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.59 : 5,340.14 = 2,101.31 : x
  2. Step 2: Convert to fraction form
    3,869.59/5,340.14 = 2,101.31/x
  3. Step 3: Cross multiply
    3,869.59x = 5,340.14 × 2,101.31
  4. Step 4: Simplify right side
    3,869.59x = 11,221,289.58
  5. Step 5: Solve for x
    x = 11,221,289.58/3,869.59
  6. Step 6: Final answer
    x = 2,899.87

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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.