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Finding the Fourth Proportional to 8,641.60, 12,963.20 and 2,717.92

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Solution

The fourth proportional to 8,641.60, 12,963.20 and 2,717.92 is: 4,077.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,641.60 : 12,963.20 = 2,717.92 : x
  2. Step 2: Convert to fraction form
    8,641.60/12,963.20 = 2,717.92/x
  3. Step 3: Cross multiply
    8,641.60x = 12,963.20 × 2,717.92
  4. Step 4: Simplify right side
    8,641.60x = 35,232,940.54
  5. Step 5: Solve for x
    x = 35,232,940.54/8,641.60
  6. Step 6: Final answer
    x = 4,077.13

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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.