Home / 8,961.12-13,443.86-2,720.78

Finding the Fourth Proportional to 8,961.12, 13,443.86 and 2,720.78

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Solution

The fourth proportional to 8,961.12, 13,443.86 and 2,720.78 is: 4,081.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,961.12 : 13,443.86 = 2,720.78 : x
  2. Step 2: Convert to fraction form
    8,961.12/13,443.86 = 2,720.78/x
  3. Step 3: Cross multiply
    8,961.12x = 13,443.86 × 2,720.78
  4. Step 4: Simplify right side
    8,961.12x = 36,577,704.59
  5. Step 5: Solve for x
    x = 36,577,704.59/8,961.12
  6. Step 6: Final answer
    x = 4,081.82

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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.