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Finding the Fourth Proportional to 18,357.53, 27,520.70 and 7,272.02

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Solution

The fourth proportional to 18,357.53, 27,520.70 and 7,272.02 is: 10,901.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,357.53 : 27,520.70 = 7,272.02 : x
  2. Step 2: Convert to fraction form
    18,357.53/27,520.70 = 7,272.02/x
  3. Step 3: Cross multiply
    18,357.53x = 27,520.70 × 7,272.02
  4. Step 4: Simplify right side
    18,357.53x = 200,131,044.45
  5. Step 5: Solve for x
    x = 200,131,044.45/18,357.53
  6. Step 6: Final answer
    x = 10,901.85

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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.