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Finding the Fourth Proportional to 21,755.25, 30,022.43 and 11,819.25

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Solution

The fourth proportional to 21,755.25, 30,022.43 and 11,819.25 is: 16,310.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,755.25 : 30,022.43 = 11,819.25 : x
  2. Step 2: Convert to fraction form
    21,755.25/30,022.43 = 11,819.25/x
  3. Step 3: Cross multiply
    21,755.25x = 30,022.43 × 11,819.25
  4. Step 4: Simplify right side
    21,755.25x = 354,842,546.68
  5. Step 5: Solve for x
    x = 354,842,546.68/21,755.25
  6. Step 6: Final answer
    x = 16,310.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.