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Finding the Fourth Proportional to 22,781.58, 31,421.60 and 16,729.92

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Solution

The fourth proportional to 22,781.58, 31,421.60 and 16,729.92 is: 23,074.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,781.58 : 31,421.60 = 16,729.92 : x
  2. Step 2: Convert to fraction form
    22,781.58/31,421.60 = 16,729.92/x
  3. Step 3: Cross multiply
    22,781.58x = 31,421.60 × 16,729.92
  4. Step 4: Simplify right side
    22,781.58x = 525,680,770.62
  5. Step 5: Solve for x
    x = 525,680,770.62/22,781.58
  6. Step 6: Final answer
    x = 23,074.82

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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.