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Finding the Fourth Proportional to 21,755.97, 32,646.90 and 7,906.05

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Solution

The fourth proportional to 21,755.97, 32,646.90 and 7,906.05 is: 11,863.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,755.97 : 32,646.90 = 7,906.05 : x
  2. Step 2: Convert to fraction form
    21,755.97/32,646.90 = 7,906.05/x
  3. Step 3: Cross multiply
    21,755.97x = 32,646.90 × 7,906.05
  4. Step 4: Simplify right side
    21,755.97x = 258,108,023.75
  5. Step 5: Solve for x
    x = 258,108,023.75/21,755.97
  6. Step 6: Final answer
    x = 11,863.78

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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.