Home / 3,115.31-4,297.59-2,892.96

Finding the Fourth Proportional to 3,115.31, 4,297.59 and 2,892.96

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Solution

The fourth proportional to 3,115.31, 4,297.59 and 2,892.96 is: 3,990.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.31 : 4,297.59 = 2,892.96 : x
  2. Step 2: Convert to fraction form
    3,115.31/4,297.59 = 2,892.96/x
  3. Step 3: Cross multiply
    3,115.31x = 4,297.59 × 2,892.96
  4. Step 4: Simplify right side
    3,115.31x = 12,432,755.97
  5. Step 5: Solve for x
    x = 12,432,755.97/3,115.31
  6. Step 6: Final answer
    x = 3,990.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.