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Finding the Fourth Proportional to 18,215, 27,322.50 and 5,903

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Solution

The fourth proportional to 18,215, 27,322.50 and 5,903 is: 8,854.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,215 : 27,322.50 = 5,903 : x
  2. Step 2: Convert to fraction form
    18,215/27,322.50 = 5,903/x
  3. Step 3: Cross multiply
    18,215x = 27,322.50 × 5,903
  4. Step 4: Simplify right side
    18,215x = 161,284,717.50
  5. Step 5: Solve for x
    x = 161,284,717.50/18,215
  6. Step 6: Final answer
    x = 8,854.50

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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.