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Finding the Fourth Proportional to 18,863.92, 26,033.76 and 12,163.50

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Solution

The fourth proportional to 18,863.92, 26,033.76 and 12,163.50 is: 16,786.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,863.92 : 26,033.76 = 12,163.50 : x
  2. Step 2: Convert to fraction form
    18,863.92/26,033.76 = 12,163.50/x
  3. Step 3: Cross multiply
    18,863.92x = 26,033.76 × 12,163.50
  4. Step 4: Simplify right side
    18,863.92x = 316,661,639.76
  5. Step 5: Solve for x
    x = 316,661,639.76/18,863.92
  6. Step 6: Final answer
    x = 16,786.63

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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.