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Finding the Fourth Proportional to 21,755.25, 30,023.46 and 12,326.85

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Solution

The fourth proportional to 21,755.25, 30,023.46 and 12,326.85 is: 17,011.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,755.25 : 30,023.46 = 12,326.85 : x
  2. Step 2: Convert to fraction form
    21,755.25/30,023.46 = 12,326.85/x
  3. Step 3: Cross multiply
    21,755.25x = 30,023.46 × 12,326.85
  4. Step 4: Simplify right side
    21,755.25x = 370,094,687.90
  5. Step 5: Solve for x
    x = 370,094,687.90/21,755.25
  6. Step 6: Final answer
    x = 17,011.74

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