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Finding the Fourth Proportional to 18,791.03, 28,191.95 and 8,916.73

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Solution

The fourth proportional to 18,791.03, 28,191.95 and 8,916.73 is: 13,377.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.03 : 28,191.95 = 8,916.73 : x
  2. Step 2: Convert to fraction form
    18,791.03/28,191.95 = 8,916.73/x
  3. Step 3: Cross multiply
    18,791.03x = 28,191.95 × 8,916.73
  4. Step 4: Simplify right side
    18,791.03x = 251,380,006.32
  5. Step 5: Solve for x
    x = 251,380,006.32/18,791.03
  6. Step 6: Final answer
    x = 13,377.66

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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.