Home / 2,820.96-3,892.89-1,687.14

Finding the Fourth Proportional to 2,820.96, 3,892.89 and 1,687.14

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Solution

The fourth proportional to 2,820.96, 3,892.89 and 1,687.14 is: 2,328.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.96 : 3,892.89 = 1,687.14 : x
  2. Step 2: Convert to fraction form
    2,820.96/3,892.89 = 1,687.14/x
  3. Step 3: Cross multiply
    2,820.96x = 3,892.89 × 1,687.14
  4. Step 4: Simplify right side
    2,820.96x = 6,567,850.43
  5. Step 5: Solve for x
    x = 6,567,850.43/2,820.96
  6. Step 6: Final answer
    x = 2,328.23

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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.