Home / 2,812.90-3,882.10-1,694.20

Finding the Fourth Proportional to 2,812.90, 3,882.10 and 1,694.20

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Solution

The fourth proportional to 2,812.90, 3,882.10 and 1,694.20 is: 2,338.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.90 : 3,882.10 = 1,694.20 : x
  2. Step 2: Convert to fraction form
    2,812.90/3,882.10 = 1,694.20/x
  3. Step 3: Cross multiply
    2,812.90x = 3,882.10 × 1,694.20
  4. Step 4: Simplify right side
    2,812.90x = 6,577,053.82
  5. Step 5: Solve for x
    x = 6,577,053.82/2,812.90
  6. Step 6: Final answer
    x = 2,338.18

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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.