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Finding the Fourth Proportional to 18,909.08, 28,324.68 and 11,099

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Solution

The fourth proportional to 18,909.08, 28,324.68 and 11,099 is: 16,625.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909.08 : 28,324.68 = 11,099 : x
  2. Step 2: Convert to fraction form
    18,909.08/28,324.68 = 11,099/x
  3. Step 3: Cross multiply
    18,909.08x = 28,324.68 × 11,099
  4. Step 4: Simplify right side
    18,909.08x = 314,375,623.32
  5. Step 5: Solve for x
    x = 314,375,623.32/18,909.08
  6. Step 6: Final answer
    x = 16,625.64

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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.