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Finding the Fourth Proportional to 19,770.75, 29,656.13 and 5,919.75

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Solution

The fourth proportional to 19,770.75, 29,656.13 and 5,919.75 is: 8,879.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,770.75 : 29,656.13 = 5,919.75 : x
  2. Step 2: Convert to fraction form
    19,770.75/29,656.13 = 5,919.75/x
  3. Step 3: Cross multiply
    19,770.75x = 29,656.13 × 5,919.75
  4. Step 4: Simplify right side
    19,770.75x = 175,556,845.97
  5. Step 5: Solve for x
    x = 175,556,845.97/19,770.75
  6. Step 6: Final answer
    x = 8,879.63

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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.