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Finding the Fourth Proportional to 6,885, 10,327.62 and 2,781

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Solution

The fourth proportional to 6,885, 10,327.62 and 2,781 is: 4,171.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,885 : 10,327.62 = 2,781 : x
  2. Step 2: Convert to fraction form
    6,885/10,327.62 = 2,781/x
  3. Step 3: Cross multiply
    6,885x = 10,327.62 × 2,781
  4. Step 4: Simplify right side
    6,885x = 28,721,111.22
  5. Step 5: Solve for x
    x = 28,721,111.22/6,885
  6. Step 6: Final answer
    x = 4,171.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.