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Finding the Fourth Proportional to 19,791.54, 29,733.75 and 18,670.68

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Solution

The fourth proportional to 19,791.54, 29,733.75 and 18,670.68 is: 28,049.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,791.54 : 29,733.75 = 18,670.68 : x
  2. Step 2: Convert to fraction form
    19,791.54/29,733.75 = 18,670.68/x
  3. Step 3: Cross multiply
    19,791.54x = 29,733.75 × 18,670.68
  4. Step 4: Simplify right side
    19,791.54x = 555,149,331.45
  5. Step 5: Solve for x
    x = 555,149,331.45/19,791.54
  6. Step 6: Final answer
    x = 28,049.83

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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.