Home / 2,811.87-3,869.97-2,064.65

Finding the Fourth Proportional to 2,811.87, 3,869.97 and 2,064.65

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Solution

The fourth proportional to 2,811.87, 3,869.97 and 2,064.65 is: 2,841.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.87 : 3,869.97 = 2,064.65 : x
  2. Step 2: Convert to fraction form
    2,811.87/3,869.97 = 2,064.65/x
  3. Step 3: Cross multiply
    2,811.87x = 3,869.97 × 2,064.65
  4. Step 4: Simplify right side
    2,811.87x = 7,990,114.21
  5. Step 5: Solve for x
    x = 7,990,114.21/2,811.87
  6. Step 6: Final answer
    x = 2,841.57

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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.