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Finding the Fourth Proportional to 18,218.65, 27,266.24 and 11,203.10

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Solution

The fourth proportional to 18,218.65, 27,266.24 and 11,203.10 is: 16,766.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,218.65 : 27,266.24 = 11,203.10 : x
  2. Step 2: Convert to fraction form
    18,218.65/27,266.24 = 11,203.10/x
  3. Step 3: Cross multiply
    18,218.65x = 27,266.24 × 11,203.10
  4. Step 4: Simplify right side
    18,218.65x = 305,466,509.52
  5. Step 5: Solve for x
    x = 305,466,509.52/18,218.65
  6. Step 6: Final answer
    x = 16,766.70

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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.