Home / 2,811.97-3,882.18-1,929.07

Finding the Fourth Proportional to 2,811.97, 3,882.18 and 1,929.07

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Solution

The fourth proportional to 2,811.97, 3,882.18 and 1,929.07 is: 2,663.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.97 : 3,882.18 = 1,929.07 : x
  2. Step 2: Convert to fraction form
    2,811.97/3,882.18 = 1,929.07/x
  3. Step 3: Cross multiply
    2,811.97x = 3,882.18 × 1,929.07
  4. Step 4: Simplify right side
    2,811.97x = 7,488,998.21
  5. Step 5: Solve for x
    x = 7,488,998.21/2,811.97
  6. Step 6: Final answer
    x = 2,663.26

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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.