Home / 3,910.89-5,395.68-2,231.09

Finding the Fourth Proportional to 3,910.89, 5,395.68 and 2,231.09

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Solution

The fourth proportional to 3,910.89, 5,395.68 and 2,231.09 is: 3,078.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,910.89 : 5,395.68 = 2,231.09 : x
  2. Step 2: Convert to fraction form
    3,910.89/5,395.68 = 2,231.09/x
  3. Step 3: Cross multiply
    3,910.89x = 5,395.68 × 2,231.09
  4. Step 4: Simplify right side
    3,910.89x = 12,038,220.71
  5. Step 5: Solve for x
    x = 12,038,220.71/3,910.89
  6. Step 6: Final answer
    x = 3,078.13

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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.