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Finding the Fourth Proportional to 18,220.68, 27,380.43 and 9,906.84

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Solution

The fourth proportional to 18,220.68, 27,380.43 and 9,906.84 is: 14,887.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,220.68 : 27,380.43 = 9,906.84 : x
  2. Step 2: Convert to fraction form
    18,220.68/27,380.43 = 9,906.84/x
  3. Step 3: Cross multiply
    18,220.68x = 27,380.43 × 9,906.84
  4. Step 4: Simplify right side
    18,220.68x = 271,253,539.14
  5. Step 5: Solve for x
    x = 271,253,539.14/18,220.68
  6. Step 6: Final answer
    x = 14,887.12

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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.