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Finding the Fourth Proportional to 18,489.58, 27,723.26 and 7,231.50

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Solution

The fourth proportional to 18,489.58, 27,723.26 and 7,231.50 is: 10,842.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,489.58 : 27,723.26 = 7,231.50 : x
  2. Step 2: Convert to fraction form
    18,489.58/27,723.26 = 7,231.50/x
  3. Step 3: Cross multiply
    18,489.58x = 27,723.26 × 7,231.50
  4. Step 4: Simplify right side
    18,489.58x = 200,480,754.69
  5. Step 5: Solve for x
    x = 200,480,754.69/18,489.58
  6. Step 6: Final answer
    x = 10,842.90

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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.