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Finding the Fourth Proportional to 40,490.96, 60,755.34 and 18,311

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Solution

The fourth proportional to 40,490.96, 60,755.34 and 18,311 is: 27,475.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,490.96 : 60,755.34 = 18,311 : x
  2. Step 2: Convert to fraction form
    40,490.96/60,755.34 = 18,311/x
  3. Step 3: Cross multiply
    40,490.96x = 60,755.34 × 18,311
  4. Step 4: Simplify right side
    40,490.96x = 1,112,491,030.74
  5. Step 5: Solve for x
    x = 1,112,491,030.74/40,490.96
  6. Step 6: Final answer
    x = 27,475.05

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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.