Home / 2,810.36-3,879.39-2,515.12

Finding the Fourth Proportional to 2,810.36, 3,879.39 and 2,515.12

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Solution

The fourth proportional to 2,810.36, 3,879.39 and 2,515.12 is: 3,471.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.36 : 3,879.39 = 2,515.12 : x
  2. Step 2: Convert to fraction form
    2,810.36/3,879.39 = 2,515.12/x
  3. Step 3: Cross multiply
    2,810.36x = 3,879.39 × 2,515.12
  4. Step 4: Simplify right side
    2,810.36x = 9,757,131.11
  5. Step 5: Solve for x
    x = 9,757,131.11/2,810.36
  6. Step 6: Final answer
    x = 3,471.84

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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.