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Finding the Fourth Proportional to 18,616.20, 27,908.10 and 11,212.80

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Solution

The fourth proportional to 18,616.20, 27,908.10 and 11,212.80 is: 16,809.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,616.20 : 27,908.10 = 11,212.80 : x
  2. Step 2: Convert to fraction form
    18,616.20/27,908.10 = 11,212.80/x
  3. Step 3: Cross multiply
    18,616.20x = 27,908.10 × 11,212.80
  4. Step 4: Simplify right side
    18,616.20x = 312,927,943.68
  5. Step 5: Solve for x
    x = 312,927,943.68/18,616.20
  6. Step 6: Final answer
    x = 16,809.44

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1.5x scale

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.