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Finding the Fourth Proportional to 18,655.57, 27,979.20 and 11,249.84

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Solution

The fourth proportional to 18,655.57, 27,979.20 and 11,249.84 is: 16,872.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,655.57 : 27,979.20 = 11,249.84 : x
  2. Step 2: Convert to fraction form
    18,655.57/27,979.20 = 11,249.84/x
  3. Step 3: Cross multiply
    18,655.57x = 27,979.20 × 11,249.84
  4. Step 4: Simplify right side
    18,655.57x = 314,761,404.25
  5. Step 5: Solve for x
    x = 314,761,404.25/18,655.57
  6. Step 6: Final answer
    x = 16,872.25

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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.