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Finding the Fourth Proportional to 8,686.73, 13,026.65 and 3,138.44

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Solution

The fourth proportional to 8,686.73, 13,026.65 and 3,138.44 is: 4,706.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686.73 : 13,026.65 = 3,138.44 : x
  2. Step 2: Convert to fraction form
    8,686.73/13,026.65 = 3,138.44/x
  3. Step 3: Cross multiply
    8,686.73x = 13,026.65 × 3,138.44
  4. Step 4: Simplify right side
    8,686.73x = 40,883,278.60
  5. Step 5: Solve for x
    x = 40,883,278.60/8,686.73
  6. Step 6: Final answer
    x = 4,706.41

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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.