Home / 3,869.09-5,339.20-2,100.66

Finding the Fourth Proportional to 3,869.09, 5,339.20 and 2,100.66

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Solution

The fourth proportional to 3,869.09, 5,339.20 and 2,100.66 is: 2,898.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.09 : 5,339.20 = 2,100.66 : x
  2. Step 2: Convert to fraction form
    3,869.09/5,339.20 = 2,100.66/x
  3. Step 3: Cross multiply
    3,869.09x = 5,339.20 × 2,100.66
  4. Step 4: Simplify right side
    3,869.09x = 11,215,846.42
  5. Step 5: Solve for x
    x = 11,215,846.42/3,869.09
  6. Step 6: Final answer
    x = 2,898.83

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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.