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Finding the Fourth Proportional to 13,411.26, 18,508.08 and 8,105.04

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Solution

The fourth proportional to 13,411.26, 18,508.08 and 8,105.04 is: 11,185.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,411.26 : 18,508.08 = 8,105.04 : x
  2. Step 2: Convert to fraction form
    13,411.26/18,508.08 = 8,105.04/x
  3. Step 3: Cross multiply
    13,411.26x = 18,508.08 × 8,105.04
  4. Step 4: Simplify right side
    13,411.26x = 150,008,728.72
  5. Step 5: Solve for x
    x = 150,008,728.72/13,411.26
  6. Step 6: Final answer
    x = 11,185.28

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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.