Home / 2,811.87-4,218.71-1,351.13

Finding the Fourth Proportional to 2,811.87, 4,218.71 and 1,351.13

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Solution

The fourth proportional to 2,811.87, 4,218.71 and 1,351.13 is: 2,027.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.87 : 4,218.71 = 1,351.13 : x
  2. Step 2: Convert to fraction form
    2,811.87/4,218.71 = 1,351.13/x
  3. Step 3: Cross multiply
    2,811.87x = 4,218.71 × 1,351.13
  4. Step 4: Simplify right side
    2,811.87x = 5,699,997.79
  5. Step 5: Solve for x
    x = 5,699,997.79/2,811.87
  6. Step 6: Final answer
    x = 2,027.12

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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.