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Finding the Fourth Proportional to 8,147, 12,220.64 and 2,600.36

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Solution

The fourth proportional to 8,147, 12,220.64 and 2,600.36 is: 3,900.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,147 : 12,220.64 = 2,600.36 : x
  2. Step 2: Convert to fraction form
    8,147/12,220.64 = 2,600.36/x
  3. Step 3: Cross multiply
    8,147x = 12,220.64 × 2,600.36
  4. Step 4: Simplify right side
    8,147x = 31,778,063.43
  5. Step 5: Solve for x
    x = 31,778,063.43/8,147
  6. Step 6: Final answer
    x = 3,900.58

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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.