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Finding the Fourth Proportional to 18,363.81, 27,542.53 and 5,213.11

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Solution

The fourth proportional to 18,363.81, 27,542.53 and 5,213.11 is: 7,818.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,363.81 : 27,542.53 = 5,213.11 : x
  2. Step 2: Convert to fraction form
    18,363.81/27,542.53 = 5,213.11/x
  3. Step 3: Cross multiply
    18,363.81x = 27,542.53 × 5,213.11
  4. Step 4: Simplify right side
    18,363.81x = 143,582,227.87
  5. Step 5: Solve for x
    x = 143,582,227.87/18,363.81
  6. Step 6: Final answer
    x = 7,818.76

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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.