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Finding the Fourth Proportional to 8,645.26, 12,969.84 and 2,641.87

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Solution

The fourth proportional to 8,645.26, 12,969.84 and 2,641.87 is: 3,963.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.26 : 12,969.84 = 2,641.87 : x
  2. Step 2: Convert to fraction form
    8,645.26/12,969.84 = 2,641.87/x
  3. Step 3: Cross multiply
    8,645.26x = 12,969.84 × 2,641.87
  4. Step 4: Simplify right side
    8,645.26x = 34,264,671.73
  5. Step 5: Solve for x
    x = 34,264,671.73/8,645.26
  6. Step 6: Final answer
    x = 3,963.41

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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.