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Finding the Fourth Proportional to 18,378.48, 27,563.56 and 5,230.56

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Solution

The fourth proportional to 18,378.48, 27,563.56 and 5,230.56 is: 7,844.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378.48 : 27,563.56 = 5,230.56 : x
  2. Step 2: Convert to fraction form
    18,378.48/27,563.56 = 5,230.56/x
  3. Step 3: Cross multiply
    18,378.48x = 27,563.56 × 5,230.56
  4. Step 4: Simplify right side
    18,378.48x = 144,172,854.39
  5. Step 5: Solve for x
    x = 144,172,854.39/18,378.48
  6. Step 6: Final answer
    x = 7,844.66

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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.