Home / 3,910.08-5,395.81-2,185.39

Finding the Fourth Proportional to 3,910.08, 5,395.81 and 2,185.39

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Solution

The fourth proportional to 3,910.08, 5,395.81 and 2,185.39 is: 3,015.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,910.08 : 5,395.81 = 2,185.39 : x
  2. Step 2: Convert to fraction form
    3,910.08/5,395.81 = 2,185.39/x
  3. Step 3: Cross multiply
    3,910.08x = 5,395.81 × 2,185.39
  4. Step 4: Simplify right side
    3,910.08x = 11,791,949.22
  5. Step 5: Solve for x
    x = 11,791,949.22/3,910.08
  6. Step 6: Final answer
    x = 3,015.78

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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.