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Finding the Fourth Proportional to 20,069.92, 27,697.92 and 12,111.72

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Solution

The fourth proportional to 20,069.92, 27,697.92 and 12,111.72 is: 16,715.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,069.92 : 27,697.92 = 12,111.72 : x
  2. Step 2: Convert to fraction form
    20,069.92/27,697.92 = 12,111.72/x
  3. Step 3: Cross multiply
    20,069.92x = 27,697.92 × 12,111.72
  4. Step 4: Simplify right side
    20,069.92x = 335,469,451.62
  5. Step 5: Solve for x
    x = 335,469,451.62/20,069.92
  6. Step 6: Final answer
    x = 16,715.04

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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.