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Finding the Fourth Proportional to 8,556.78, 12,836.40 and 2,711.40

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Solution

The fourth proportional to 8,556.78, 12,836.40 and 2,711.40 is: 4,067.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,556.78 : 12,836.40 = 2,711.40 : x
  2. Step 2: Convert to fraction form
    8,556.78/12,836.40 = 2,711.40/x
  3. Step 3: Cross multiply
    8,556.78x = 12,836.40 × 2,711.40
  4. Step 4: Simplify right side
    8,556.78x = 34,804,614.96
  5. Step 5: Solve for x
    x = 34,804,614.96/8,556.78
  6. Step 6: Final answer
    x = 4,067.49

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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.