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Finding the Fourth Proportional to 11,388.62, 17,107.21 and 10,722.80

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Solution

The fourth proportional to 11,388.62, 17,107.21 and 10,722.80 is: 16,107.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,388.62 : 17,107.21 = 10,722.80 : x
  2. Step 2: Convert to fraction form
    11,388.62/17,107.21 = 10,722.80/x
  3. Step 3: Cross multiply
    11,388.62x = 17,107.21 × 10,722.80
  4. Step 4: Simplify right side
    11,388.62x = 183,437,191.39
  5. Step 5: Solve for x
    x = 183,437,191.39/11,388.62
  6. Step 6: Final answer
    x = 16,107.06

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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.