Home / 2,789.36-3,849.36-1,992.88

Finding the Fourth Proportional to 2,789.36, 3,849.36 and 1,992.88

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Solution

The fourth proportional to 2,789.36, 3,849.36 and 1,992.88 is: 2,750.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,789.36 : 3,849.36 = 1,992.88 : x
  2. Step 2: Convert to fraction form
    2,789.36/3,849.36 = 1,992.88/x
  3. Step 3: Cross multiply
    2,789.36x = 3,849.36 × 1,992.88
  4. Step 4: Simplify right side
    2,789.36x = 7,671,312.56
  5. Step 5: Solve for x
    x = 7,671,312.56/2,789.36
  6. Step 6: Final answer
    x = 2,750.21

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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.