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Finding the Fourth Proportional to 8,720.97, 13,074.06 and 3,786.87

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Solution

The fourth proportional to 8,720.97, 13,074.06 and 3,786.87 is: 5,677.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.97 : 13,074.06 = 3,786.87 : x
  2. Step 2: Convert to fraction form
    8,720.97/13,074.06 = 3,786.87/x
  3. Step 3: Cross multiply
    8,720.97x = 13,074.06 × 3,786.87
  4. Step 4: Simplify right side
    8,720.97x = 49,509,765.59
  5. Step 5: Solve for x
    x = 49,509,765.59/8,720.97
  6. Step 6: Final answer
    x = 5,677.09

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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.