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Finding the Fourth Proportional to 19,876.83, 29,796.71 and 6,720

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Solution

The fourth proportional to 19,876.83, 29,796.71 and 6,720 is: 10,073.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,876.83 : 29,796.71 = 6,720 : x
  2. Step 2: Convert to fraction form
    19,876.83/29,796.71 = 6,720/x
  3. Step 3: Cross multiply
    19,876.83x = 29,796.71 × 6,720
  4. Step 4: Simplify right side
    19,876.83x = 200,233,891.20
  5. Step 5: Solve for x
    x = 200,233,891.20/19,876.83
  6. Step 6: Final answer
    x = 10,073.73

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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.