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Finding the Fourth Proportional to 19,778.86, 29,674.50 and 8,694.87

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Solution

The fourth proportional to 19,778.86, 29,674.50 and 8,694.87 is: 13,045.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,778.86 : 29,674.50 = 8,694.87 : x
  2. Step 2: Convert to fraction form
    19,778.86/29,674.50 = 8,694.87/x
  3. Step 3: Cross multiply
    19,778.86x = 29,674.50 × 8,694.87
  4. Step 4: Simplify right side
    19,778.86x = 258,015,919.82
  5. Step 5: Solve for x
    x = 258,015,919.82/19,778.86
  6. Step 6: Final answer
    x = 13,045.03

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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.