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Finding the Fourth Proportional to 18,054.81, 27,079.47 and 6,959.88

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Solution

The fourth proportional to 18,054.81, 27,079.47 and 6,959.88 is: 10,438.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,054.81 : 27,079.47 = 6,959.88 : x
  2. Step 2: Convert to fraction form
    18,054.81/27,079.47 = 6,959.88/x
  3. Step 3: Cross multiply
    18,054.81x = 27,079.47 × 6,959.88
  4. Step 4: Simplify right side
    18,054.81x = 188,469,861.66
  5. Step 5: Solve for x
    x = 188,469,861.66/18,054.81
  6. Step 6: Final answer
    x = 10,438.76

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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.