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Finding the Fourth Proportional to 40,213.78, 60,340.79 and 18,043

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Solution

The fourth proportional to 40,213.78, 60,340.79 and 18,043 is: 27,073.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,213.78 : 60,340.79 = 18,043 : x
  2. Step 2: Convert to fraction form
    40,213.78/60,340.79 = 18,043/x
  3. Step 3: Cross multiply
    40,213.78x = 60,340.79 × 18,043
  4. Step 4: Simplify right side
    40,213.78x = 1,088,728,873.97
  5. Step 5: Solve for x
    x = 1,088,728,873.97/40,213.78
  6. Step 6: Final answer
    x = 27,073.53

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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.