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Finding the Fourth Proportional to 18,143.73, 27,212.46 and 4,992.99

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Solution

The fourth proportional to 18,143.73, 27,212.46 and 4,992.99 is: 7,488.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,143.73 : 27,212.46 = 4,992.99 : x
  2. Step 2: Convert to fraction form
    18,143.73/27,212.46 = 4,992.99/x
  3. Step 3: Cross multiply
    18,143.73x = 27,212.46 × 4,992.99
  4. Step 4: Simplify right side
    18,143.73x = 135,871,540.66
  5. Step 5: Solve for x
    x = 135,871,540.66/18,143.73
  6. Step 6: Final answer
    x = 7,488.62

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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.