Home / 2,115.86-3,158.09-1,896.62

Finding the Fourth Proportional to 2,115.86, 3,158.09 and 1,896.62

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Solution

The fourth proportional to 2,115.86, 3,158.09 and 1,896.62 is: 2,830.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.86 : 3,158.09 = 1,896.62 : x
  2. Step 2: Convert to fraction form
    2,115.86/3,158.09 = 1,896.62/x
  3. Step 3: Cross multiply
    2,115.86x = 3,158.09 × 1,896.62
  4. Step 4: Simplify right side
    2,115.86x = 5,989,678.49
  5. Step 5: Solve for x
    x = 5,989,678.49/2,115.86
  6. Step 6: Final answer
    x = 2,830.85

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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.