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Finding the Fourth Proportional to 21,947.80, 32,920.96 and 8,796.64

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Solution

The fourth proportional to 21,947.80, 32,920.96 and 8,796.64 is: 13,194.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,947.80 : 32,920.96 = 8,796.64 : x
  2. Step 2: Convert to fraction form
    21,947.80/32,920.96 = 8,796.64/x
  3. Step 3: Cross multiply
    21,947.80x = 32,920.96 × 8,796.64
  4. Step 4: Simplify right side
    21,947.80x = 289,593,833.57
  5. Step 5: Solve for x
    x = 289,593,833.57/21,947.80
  6. Step 6: Final answer
    x = 13,194.66

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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.