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Finding the Fourth Proportional to 21,990.80, 32,991.24 and 8,843.60

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Solution

The fourth proportional to 21,990.80, 32,991.24 and 8,843.60 is: 13,267.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.80 : 32,991.24 = 8,843.60 : x
  2. Step 2: Convert to fraction form
    21,990.80/32,991.24 = 8,843.60/x
  3. Step 3: Cross multiply
    21,990.80x = 32,991.24 × 8,843.60
  4. Step 4: Simplify right side
    21,990.80x = 291,761,330.06
  5. Step 5: Solve for x
    x = 291,761,330.06/21,990.80
  6. Step 6: Final answer
    x = 13,267.43

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1.5x scale

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.