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Finding the Fourth Proportional to 18,933,940.32, 28,372,008.03 and 11,242,438.71

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Solution

The fourth proportional to 18,933,940.32, 28,372,008.03 and 11,242,438.71 is: 16,846,496.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,933,940.32 : 28,372,008.03 = 11,242,438.71 : x
  2. Step 2: Convert to fraction form
    18,933,940.32/28,372,008.03 = 11,242,438.71/x
  3. Step 3: Cross multiply
    18,933,940.32x = 28,372,008.03 × 11,242,438.71
  4. Step 4: Simplify right side
    18,933,940.32x = 318,970,561,356,902.88
  5. Step 5: Solve for x
    x = 318,970,561,356,902.88/18,933,940.32
  6. Step 6: Final answer
    x = 16,846,496.61

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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.