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Finding the Fourth Proportional to 20,179.84, 27,850 and 11,227.20

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Solution

The fourth proportional to 20,179.84, 27,850 and 11,227.20 is: 15,494.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,179.84 : 27,850 = 11,227.20 : x
  2. Step 2: Convert to fraction form
    20,179.84/27,850 = 11,227.20/x
  3. Step 3: Cross multiply
    20,179.84x = 27,850 × 11,227.20
  4. Step 4: Simplify right side
    20,179.84x = 312,677,520
  5. Step 5: Solve for x
    x = 312,677,520/20,179.84
  6. Step 6: Final answer
    x = 15,494.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.