Home / 3,900.33-5,377.05-2,639.39

Finding the Fourth Proportional to 3,900.33, 5,377.05 and 2,639.39

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Solution

The fourth proportional to 3,900.33, 5,377.05 and 2,639.39 is: 3,638.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.33 : 5,377.05 = 2,639.39 : x
  2. Step 2: Convert to fraction form
    3,900.33/5,377.05 = 2,639.39/x
  3. Step 3: Cross multiply
    3,900.33x = 5,377.05 × 2,639.39
  4. Step 4: Simplify right side
    3,900.33x = 14,192,105.11
  5. Step 5: Solve for x
    x = 14,192,105.11/3,900.33
  6. Step 6: Final answer
    x = 3,638.69

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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.