Home / 5,139.09-7,091.97-2,781.26

Finding the Fourth Proportional to 5,139.09, 7,091.97 and 2,781.26

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Solution

The fourth proportional to 5,139.09, 7,091.97 and 2,781.26 is: 3,838.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.09 : 7,091.97 = 2,781.26 : x
  2. Step 2: Convert to fraction form
    5,139.09/7,091.97 = 2,781.26/x
  3. Step 3: Cross multiply
    5,139.09x = 7,091.97 × 2,781.26
  4. Step 4: Simplify right side
    5,139.09x = 19,724,577.02
  5. Step 5: Solve for x
    x = 19,724,577.02/5,139.09
  6. Step 6: Final answer
    x = 3,838.15

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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.