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Finding the Fourth Proportional to 18,326, 27,487.02 and 12,440.60

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Solution

The fourth proportional to 18,326, 27,487.02 and 12,440.60 is: 18,659.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,326 : 27,487.02 = 12,440.60 : x
  2. Step 2: Convert to fraction form
    18,326/27,487.02 = 12,440.60/x
  3. Step 3: Cross multiply
    18,326x = 27,487.02 × 12,440.60
  4. Step 4: Simplify right side
    18,326x = 341,955,021.01
  5. Step 5: Solve for x
    x = 341,955,021.01/18,326
  6. Step 6: Final answer
    x = 18,659.56

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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.