Home / 2,115.86-3,158.36-1,942.52

Finding the Fourth Proportional to 2,115.86, 3,158.36 and 1,942.52

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Solution

The fourth proportional to 2,115.86, 3,158.36 and 1,942.52 is: 2,899.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.86 : 3,158.36 = 1,942.52 : x
  2. Step 2: Convert to fraction form
    2,115.86/3,158.36 = 1,942.52/x
  3. Step 3: Cross multiply
    2,115.86x = 3,158.36 × 1,942.52
  4. Step 4: Simplify right side
    2,115.86x = 6,135,159.25
  5. Step 5: Solve for x
    x = 6,135,159.25/2,115.86
  6. Step 6: Final answer
    x = 2,899.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.