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Finding the Fourth Proportional to 18,072.20, 27,108.30 and 11,871.40

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Solution

The fourth proportional to 18,072.20, 27,108.30 and 11,871.40 is: 17,807.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,072.20 : 27,108.30 = 11,871.40 : x
  2. Step 2: Convert to fraction form
    18,072.20/27,108.30 = 11,871.40/x
  3. Step 3: Cross multiply
    18,072.20x = 27,108.30 × 11,871.40
  4. Step 4: Simplify right side
    18,072.20x = 321,813,472.62
  5. Step 5: Solve for x
    x = 321,813,472.62/18,072.20
  6. Step 6: Final answer
    x = 17,807.10

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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.