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Finding the Fourth Proportional to 18,144, 27,216.02 and 7,200

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Solution

The fourth proportional to 18,144, 27,216.02 and 7,200 is: 10,800.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,144 : 27,216.02 = 7,200 : x
  2. Step 2: Convert to fraction form
    18,144/27,216.02 = 7,200/x
  3. Step 3: Cross multiply
    18,144x = 27,216.02 × 7,200
  4. Step 4: Simplify right side
    18,144x = 195,955,344
  5. Step 5: Solve for x
    x = 195,955,344/18,144
  6. Step 6: Final answer
    x = 10,800.01

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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.