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Finding the Fourth Proportional to 18,722.94, 28,083.84 and 7,626.87

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Solution

The fourth proportional to 18,722.94, 28,083.84 and 7,626.87 is: 11,440.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,722.94 : 28,083.84 = 7,626.87 : x
  2. Step 2: Convert to fraction form
    18,722.94/28,083.84 = 7,626.87/x
  3. Step 3: Cross multiply
    18,722.94x = 28,083.84 × 7,626.87
  4. Step 4: Simplify right side
    18,722.94x = 214,191,796.78
  5. Step 5: Solve for x
    x = 214,191,796.78/18,722.94
  6. Step 6: Final answer
    x = 11,440.07

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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.