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Finding the Fourth Proportional to 18,378.15, 27,581.09 and 13,460.54

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Solution

The fourth proportional to 18,378.15, 27,581.09 and 13,460.54 is: 20,200.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378.15 : 27,581.09 = 13,460.54 : x
  2. Step 2: Convert to fraction form
    18,378.15/27,581.09 = 13,460.54/x
  3. Step 3: Cross multiply
    18,378.15x = 27,581.09 × 13,460.54
  4. Step 4: Simplify right side
    18,378.15x = 371,256,365.19
  5. Step 5: Solve for x
    x = 371,256,365.19/18,378.15
  6. Step 6: Final answer
    x = 20,200.97

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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.