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Finding the Fourth Proportional to 18,791.90, 28,179.05 and 10,896.67

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Solution

The fourth proportional to 18,791.90, 28,179.05 and 10,896.67 is: 16,339.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.90 : 28,179.05 = 10,896.67 : x
  2. Step 2: Convert to fraction form
    18,791.90/28,179.05 = 10,896.67/x
  3. Step 3: Cross multiply
    18,791.90x = 28,179.05 × 10,896.67
  4. Step 4: Simplify right side
    18,791.90x = 307,057,808.76
  5. Step 5: Solve for x
    x = 307,057,808.76/18,791.90
  6. Step 6: Final answer
    x = 16,339.90

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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.