Home / 5,138.86-7,091.63-2,781.00

Finding the Fourth Proportional to 5,138.86, 7,091.63 and 2,781.00

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Solution

The fourth proportional to 5,138.86, 7,091.63 and 2,781.00 is: 3,837.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.86 : 7,091.63 = 2,781.00 : x
  2. Step 2: Convert to fraction form
    5,138.86/7,091.63 = 2,781.00/x
  3. Step 3: Cross multiply
    5,138.86x = 7,091.63 × 2,781.00
  4. Step 4: Simplify right side
    5,138.86x = 19,721,787.57
  5. Step 5: Solve for x
    x = 19,721,787.57/5,138.86
  6. Step 6: Final answer
    x = 3,837.77

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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.