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Finding the Fourth Proportional to 18,752.87, 28,121.11 and 8,894.97

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Solution

The fourth proportional to 18,752.87, 28,121.11 and 8,894.97 is: 13,338.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,752.87 : 28,121.11 = 8,894.97 : x
  2. Step 2: Convert to fraction form
    18,752.87/28,121.11 = 8,894.97/x
  3. Step 3: Cross multiply
    18,752.87x = 28,121.11 × 8,894.97
  4. Step 4: Simplify right side
    18,752.87x = 250,136,407.58
  5. Step 5: Solve for x
    x = 250,136,407.58/18,752.87
  6. Step 6: Final answer
    x = 13,338.56

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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.