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Finding the Fourth Proportional to 20,672.98, 28,518.69 and 12,283.54

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Solution

The fourth proportional to 20,672.98, 28,518.69 and 12,283.54 is: 16,945.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,672.98 : 28,518.69 = 12,283.54 : x
  2. Step 2: Convert to fraction form
    20,672.98/28,518.69 = 12,283.54/x
  3. Step 3: Cross multiply
    20,672.98x = 28,518.69 × 12,283.54
  4. Step 4: Simplify right side
    20,672.98x = 350,310,469.36
  5. Step 5: Solve for x
    x = 350,310,469.36/20,672.98
  6. Step 6: Final answer
    x = 16,945.33

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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.