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Finding the Fourth Proportional to 8,612.18, 12,918.34 and 2,372.54

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Solution

The fourth proportional to 8,612.18, 12,918.34 and 2,372.54 is: 3,558.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.18 : 12,918.34 = 2,372.54 : x
  2. Step 2: Convert to fraction form
    8,612.18/12,918.34 = 2,372.54/x
  3. Step 3: Cross multiply
    8,612.18x = 12,918.34 × 2,372.54
  4. Step 4: Simplify right side
    8,612.18x = 30,649,201.93
  5. Step 5: Solve for x
    x = 30,649,201.93/8,612.18
  6. Step 6: Final answer
    x = 3,558.82

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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.