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Finding the Fourth Proportional to 18,753.62, 28,136.37 and 11,738.12

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Solution

The fourth proportional to 18,753.62, 28,136.37 and 11,738.12 is: 17,610.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.62 : 28,136.37 = 11,738.12 : x
  2. Step 2: Convert to fraction form
    18,753.62/28,136.37 = 11,738.12/x
  3. Step 3: Cross multiply
    18,753.62x = 28,136.37 × 11,738.12
  4. Step 4: Simplify right side
    18,753.62x = 330,268,087.42
  5. Step 5: Solve for x
    x = 330,268,087.42/18,753.62
  6. Step 6: Final answer
    x = 17,610.90

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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.