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Finding the Fourth Proportional to 18,912.15, 28,372.79 and 5,763.72

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Solution

The fourth proportional to 18,912.15, 28,372.79 and 5,763.72 is: 8,646.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,912.15 : 28,372.79 = 5,763.72 : x
  2. Step 2: Convert to fraction form
    18,912.15/28,372.79 = 5,763.72/x
  3. Step 3: Cross multiply
    18,912.15x = 28,372.79 × 5,763.72
  4. Step 4: Simplify right side
    18,912.15x = 163,532,788.36
  5. Step 5: Solve for x
    x = 163,532,788.36/18,912.15
  6. Step 6: Final answer
    x = 8,646.97

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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.