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Finding the Fourth Proportional to 18,063.63, 27,136.98 and 12,811.64

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Solution

The fourth proportional to 18,063.63, 27,136.98 and 12,811.64 is: 19,246.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,063.63 : 27,136.98 = 12,811.64 : x
  2. Step 2: Convert to fraction form
    18,063.63/27,136.98 = 12,811.64/x
  3. Step 3: Cross multiply
    18,063.63x = 27,136.98 × 12,811.64
  4. Step 4: Simplify right side
    18,063.63x = 347,669,082.76
  5. Step 5: Solve for x
    x = 347,669,082.76/18,063.63
  6. Step 6: Final answer
    x = 19,246.91

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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.