Home / 2,874.13-3,977.70-2,805.11

Finding the Fourth Proportional to 2,874.13, 3,977.70 and 2,805.11

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Solution

The fourth proportional to 2,874.13, 3,977.70 and 2,805.11 is: 3,882.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,874.13 : 3,977.70 = 2,805.11 : x
  2. Step 2: Convert to fraction form
    2,874.13/3,977.70 = 2,805.11/x
  3. Step 3: Cross multiply
    2,874.13x = 3,977.70 × 2,805.11
  4. Step 4: Simplify right side
    2,874.13x = 11,157,870.56
  5. Step 5: Solve for x
    x = 11,157,870.56/2,874.13
  6. Step 6: Final answer
    x = 3,882.18

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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.