Home / 5,138.94-7,091.80-2,781.08

Finding the Fourth Proportional to 5,138.94, 7,091.80 and 2,781.08

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Solution

The fourth proportional to 5,138.94, 7,091.80 and 2,781.08 is: 3,837.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.94 : 7,091.80 = 2,781.08 : x
  2. Step 2: Convert to fraction form
    5,138.94/7,091.80 = 2,781.08/x
  3. Step 3: Cross multiply
    5,138.94x = 7,091.80 × 2,781.08
  4. Step 4: Simplify right side
    5,138.94x = 19,722,857.98
  5. Step 5: Solve for x
    x = 19,722,857.98/5,138.94
  6. Step 6: Final answer
    x = 3,837.93

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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.