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Finding the Fourth Proportional to 8,661.84, 12,995.78 and 2,739.64

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Solution

The fourth proportional to 8,661.84, 12,995.78 and 2,739.64 is: 4,110.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.84 : 12,995.78 = 2,739.64 : x
  2. Step 2: Convert to fraction form
    8,661.84/12,995.78 = 2,739.64/x
  3. Step 3: Cross multiply
    8,661.84x = 12,995.78 × 2,739.64
  4. Step 4: Simplify right side
    8,661.84x = 35,603,758.72
  5. Step 5: Solve for x
    x = 35,603,758.72/8,661.84
  6. Step 6: Final answer
    x = 4,110.42

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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.