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Finding the Fourth Proportional to 19,753.92, 27,276.12 and 12,211.20

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Solution

The fourth proportional to 19,753.92, 27,276.12 and 12,211.20 is: 16,861.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,753.92 : 27,276.12 = 12,211.20 : x
  2. Step 2: Convert to fraction form
    19,753.92/27,276.12 = 12,211.20/x
  3. Step 3: Cross multiply
    19,753.92x = 27,276.12 × 12,211.20
  4. Step 4: Simplify right side
    19,753.92x = 333,074,156.54
  5. Step 5: Solve for x
    x = 333,074,156.54/19,753.92
  6. Step 6: Final answer
    x = 16,861.17

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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.