Home / 3,869.10-5,339.39-2,100.69

Finding the Fourth Proportional to 3,869.10, 5,339.39 and 2,100.69

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Solution

The fourth proportional to 3,869.10, 5,339.39 and 2,100.69 is: 2,898.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.10 : 5,339.39 = 2,100.69 : x
  2. Step 2: Convert to fraction form
    3,869.10/5,339.39 = 2,100.69/x
  3. Step 3: Cross multiply
    3,869.10x = 5,339.39 × 2,100.69
  4. Step 4: Simplify right side
    3,869.10x = 11,216,392.68
  5. Step 5: Solve for x
    x = 11,216,392.68/3,869.10
  6. Step 6: Final answer
    x = 2,898.97

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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.