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Finding the Fourth Proportional to 18,356.72, 27,530.62 and 8,486.57

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Solution

The fourth proportional to 18,356.72, 27,530.62 and 8,486.57 is: 12,727.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,356.72 : 27,530.62 = 8,486.57 : x
  2. Step 2: Convert to fraction form
    18,356.72/27,530.62 = 8,486.57/x
  3. Step 3: Cross multiply
    18,356.72x = 27,530.62 × 8,486.57
  4. Step 4: Simplify right side
    18,356.72x = 233,640,581.38
  5. Step 5: Solve for x
    x = 233,640,581.38/18,356.72
  6. Step 6: Final answer
    x = 12,727.80

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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.