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Finding the Fourth Proportional to 13,755.09, 20,630.01 and 3,891.99

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Solution

The fourth proportional to 13,755.09, 20,630.01 and 3,891.99 is: 5,837.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,755.09 : 20,630.01 = 3,891.99 : x
  2. Step 2: Convert to fraction form
    13,755.09/20,630.01 = 3,891.99/x
  3. Step 3: Cross multiply
    13,755.09x = 20,630.01 × 3,891.99
  4. Step 4: Simplify right side
    13,755.09x = 80,291,792.62
  5. Step 5: Solve for x
    x = 80,291,792.62/13,755.09
  6. Step 6: Final answer
    x = 5,837.24

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Why These Related Problems?

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