Home / 3,108.72-4,659.30-2,780.68

Finding the Fourth Proportional to 3,108.72, 4,659.30 and 2,780.68

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Solution

The fourth proportional to 3,108.72, 4,659.30 and 2,780.68 is: 4,167.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.72 : 4,659.30 = 2,780.68 : x
  2. Step 2: Convert to fraction form
    3,108.72/4,659.30 = 2,780.68/x
  3. Step 3: Cross multiply
    3,108.72x = 4,659.30 × 2,780.68
  4. Step 4: Simplify right side
    3,108.72x = 12,956,022.32
  5. Step 5: Solve for x
    x = 12,956,022.32/3,108.72
  6. Step 6: Final answer
    x = 4,167.64

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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.