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Finding the Fourth Proportional to 18,390.53, 27,589.94 and 6,703.79

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Solution

The fourth proportional to 18,390.53, 27,589.94 and 6,703.79 is: 10,057.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.53 : 27,589.94 = 6,703.79 : x
  2. Step 2: Convert to fraction form
    18,390.53/27,589.94 = 6,703.79/x
  3. Step 3: Cross multiply
    18,390.53x = 27,589.94 × 6,703.79
  4. Step 4: Simplify right side
    18,390.53x = 184,957,163.87
  5. Step 5: Solve for x
    x = 184,957,163.87/18,390.53
  6. Step 6: Final answer
    x = 10,057.20

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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.