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Finding the Fourth Proportional to 18,517.60, 27,739.95 and 11,100.03

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Solution

The fourth proportional to 18,517.60, 27,739.95 and 11,100.03 is: 16,628.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,517.60 : 27,739.95 = 11,100.03 : x
  2. Step 2: Convert to fraction form
    18,517.60/27,739.95 = 11,100.03/x
  3. Step 3: Cross multiply
    18,517.60x = 27,739.95 × 11,100.03
  4. Step 4: Simplify right side
    18,517.60x = 307,914,277.20
  5. Step 5: Solve for x
    x = 307,914,277.20/18,517.60
  6. Step 6: Final answer
    x = 16,628.20

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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.