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Finding the Fourth Proportional to 18,601.29, 27,920.21 and 13,656.96

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Solution

The fourth proportional to 18,601.29, 27,920.21 and 13,656.96 is: 20,498.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,601.29 : 27,920.21 = 13,656.96 : x
  2. Step 2: Convert to fraction form
    18,601.29/27,920.21 = 13,656.96/x
  3. Step 3: Cross multiply
    18,601.29x = 27,920.21 × 13,656.96
  4. Step 4: Simplify right side
    18,601.29x = 381,305,122.88
  5. Step 5: Solve for x
    x = 381,305,122.88/18,601.29
  6. Step 6: Final answer
    x = 20,498.85

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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.