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Finding the Fourth Proportional to 18,619.88, 27,912.80 and 16,996.64

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Solution

The fourth proportional to 18,619.88, 27,912.80 and 16,996.64 is: 25,479.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.88 : 27,912.80 = 16,996.64 : x
  2. Step 2: Convert to fraction form
    18,619.88/27,912.80 = 16,996.64/x
  3. Step 3: Cross multiply
    18,619.88x = 27,912.80 × 16,996.64
  4. Step 4: Simplify right side
    18,619.88x = 474,423,715.92
  5. Step 5: Solve for x
    x = 474,423,715.92/18,619.88
  6. Step 6: Final answer
    x = 25,479.43

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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.