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Finding the Fourth Proportional to 21,997.80, 33,012.90 and 8,859.60

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Solution

The fourth proportional to 21,997.80, 33,012.90 and 8,859.60 is: 13,295.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,997.80 : 33,012.90 = 8,859.60 : x
  2. Step 2: Convert to fraction form
    21,997.80/33,012.90 = 8,859.60/x
  3. Step 3: Cross multiply
    21,997.80x = 33,012.90 × 8,859.60
  4. Step 4: Simplify right side
    21,997.80x = 292,481,088.84
  5. Step 5: Solve for x
    x = 292,481,088.84/21,997.80
  6. Step 6: Final answer
    x = 13,295.92

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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.