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Finding the Fourth Proportional to 8,612.88, 12,917.61 and 2,371.29

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Solution

The fourth proportional to 8,612.88, 12,917.61 and 2,371.29 is: 3,556.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.88 : 12,917.61 = 2,371.29 : x
  2. Step 2: Convert to fraction form
    8,612.88/12,917.61 = 2,371.29/x
  3. Step 3: Cross multiply
    8,612.88x = 12,917.61 × 2,371.29
  4. Step 4: Simplify right side
    8,612.88x = 30,631,399.42
  5. Step 5: Solve for x
    x = 30,631,399.42/8,612.88
  6. Step 6: Final answer
    x = 3,556.46

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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.