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Finding the Fourth Proportional to 9,219.28, 12,728.20 and 6,235.60

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Solution

The fourth proportional to 9,219.28, 12,728.20 and 6,235.60 is: 8,608.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,219.28 : 12,728.20 = 6,235.60 : x
  2. Step 2: Convert to fraction form
    9,219.28/12,728.20 = 6,235.60/x
  3. Step 3: Cross multiply
    9,219.28x = 12,728.20 × 6,235.60
  4. Step 4: Simplify right side
    9,219.28x = 79,367,963.92
  5. Step 5: Solve for x
    x = 79,367,963.92/9,219.28
  6. Step 6: Final answer
    x = 8,608.91

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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.