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Finding the Fourth Proportional to 18,801.87, 28,193.96 and 10,906.63

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Solution

The fourth proportional to 18,801.87, 28,193.96 and 10,906.63 is: 16,354.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,801.87 : 28,193.96 = 10,906.63 : x
  2. Step 2: Convert to fraction form
    18,801.87/28,193.96 = 10,906.63/x
  3. Step 3: Cross multiply
    18,801.87x = 28,193.96 × 10,906.63
  4. Step 4: Simplify right side
    18,801.87x = 307,501,035.42
  5. Step 5: Solve for x
    x = 307,501,035.42/18,801.87
  6. Step 6: Final answer
    x = 16,354.81

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1.5x scale

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.