Home / 2,786.92-3,837.18-2,121.64

Finding the Fourth Proportional to 2,786.92, 3,837.18 and 2,121.64

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Solution

The fourth proportional to 2,786.92, 3,837.18 and 2,121.64 is: 2,921.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,786.92 : 3,837.18 = 2,121.64 : x
  2. Step 2: Convert to fraction form
    2,786.92/3,837.18 = 2,121.64/x
  3. Step 3: Cross multiply
    2,786.92x = 3,837.18 × 2,121.64
  4. Step 4: Simplify right side
    2,786.92x = 8,141,114.58
  5. Step 5: Solve for x
    x = 8,141,114.58/2,786.92
  6. Step 6: Final answer
    x = 2,921.19

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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.