Home / 2,821.30-3,893.34-1,687.10

Finding the Fourth Proportional to 2,821.30, 3,893.34 and 1,687.10

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Solution

The fourth proportional to 2,821.30, 3,893.34 and 1,687.10 is: 2,328.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.30 : 3,893.34 = 1,687.10 : x
  2. Step 2: Convert to fraction form
    2,821.30/3,893.34 = 1,687.10/x
  3. Step 3: Cross multiply
    2,821.30x = 3,893.34 × 1,687.10
  4. Step 4: Simplify right side
    2,821.30x = 6,568,440.77
  5. Step 5: Solve for x
    x = 6,568,440.77/2,821.30
  6. Step 6: Final answer
    x = 2,328.16

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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.