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Finding the Fourth Proportional to 19,793.78, 29,693.40 and 6,649.91

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Solution

The fourth proportional to 19,793.78, 29,693.40 and 6,649.91 is: 9,975.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,793.78 : 29,693.40 = 6,649.91 : x
  2. Step 2: Convert to fraction form
    19,793.78/29,693.40 = 6,649.91/x
  3. Step 3: Cross multiply
    19,793.78x = 29,693.40 × 6,649.91
  4. Step 4: Simplify right side
    19,793.78x = 197,458,363.36
  5. Step 5: Solve for x
    x = 197,458,363.36/19,793.78
  6. Step 6: Final answer
    x = 9,975.78

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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.