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Finding the Fourth Proportional to 13,612.57, 20,379.90 and 9,222.23

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Solution

The fourth proportional to 13,612.57, 20,379.90 and 9,222.23 is: 13,806.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.57 : 20,379.90 = 9,222.23 : x
  2. Step 2: Convert to fraction form
    13,612.57/20,379.90 = 9,222.23/x
  3. Step 3: Cross multiply
    13,612.57x = 20,379.90 × 9,222.23
  4. Step 4: Simplify right side
    13,612.57x = 187,948,125.18
  5. Step 5: Solve for x
    x = 187,948,125.18/13,612.57
  6. Step 6: Final answer
    x = 13,806.95

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.