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Finding the Fourth Proportional to 31,881.48, 44,016.12 and 20,554.98

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Solution

The fourth proportional to 31,881.48, 44,016.12 and 20,554.98 is: 28,378.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,881.48 : 44,016.12 = 20,554.98 : x
  2. Step 2: Convert to fraction form
    31,881.48/44,016.12 = 20,554.98/x
  3. Step 3: Cross multiply
    31,881.48x = 44,016.12 × 20,554.98
  4. Step 4: Simplify right side
    31,881.48x = 904,750,466.28
  5. Step 5: Solve for x
    x = 904,750,466.28/31,881.48
  6. Step 6: Final answer
    x = 28,378.56

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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.