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Finding the Fourth Proportional to 18,212.52, 27,318.81 and 5,064.90

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Solution

The fourth proportional to 18,212.52, 27,318.81 and 5,064.90 is: 7,597.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,212.52 : 27,318.81 = 5,064.90 : x
  2. Step 2: Convert to fraction form
    18,212.52/27,318.81 = 5,064.90/x
  3. Step 3: Cross multiply
    18,212.52x = 27,318.81 × 5,064.90
  4. Step 4: Simplify right side
    18,212.52x = 138,367,040.77
  5. Step 5: Solve for x
    x = 138,367,040.77/18,212.52
  6. Step 6: Final answer
    x = 7,597.36

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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.