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Finding the Fourth Proportional to 33,795.30, 50,657.78 and 12,720.90

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Solution

The fourth proportional to 33,795.30, 50,657.78 and 12,720.90 is: 19,068.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,795.30 : 50,657.78 = 12,720.90 : x
  2. Step 2: Convert to fraction form
    33,795.30/50,657.78 = 12,720.90/x
  3. Step 3: Cross multiply
    33,795.30x = 50,657.78 × 12,720.90
  4. Step 4: Simplify right side
    33,795.30x = 644,412,553.60
  5. Step 5: Solve for x
    x = 644,412,553.60/33,795.30
  6. Step 6: Final answer
    x = 19,068.11

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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.