Home / 3,899.54-5,381.66-2,221.01

Finding the Fourth Proportional to 3,899.54, 5,381.66 and 2,221.01

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Solution

The fourth proportional to 3,899.54, 5,381.66 and 2,221.01 is: 3,065.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.54 : 5,381.66 = 2,221.01 : x
  2. Step 2: Convert to fraction form
    3,899.54/5,381.66 = 2,221.01/x
  3. Step 3: Cross multiply
    3,899.54x = 5,381.66 × 2,221.01
  4. Step 4: Simplify right side
    3,899.54x = 11,952,739.68
  5. Step 5: Solve for x
    x = 11,952,739.68/3,899.54
  6. Step 6: Final answer
    x = 3,065.17

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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.