Home / 2,806.12-3,872.58-1,687.12

Finding the Fourth Proportional to 2,806.12, 3,872.58 and 1,687.12

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Solution

The fourth proportional to 2,806.12, 3,872.58 and 1,687.12 is: 2,328.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,806.12 : 3,872.58 = 1,687.12 : x
  2. Step 2: Convert to fraction form
    2,806.12/3,872.58 = 1,687.12/x
  3. Step 3: Cross multiply
    2,806.12x = 3,872.58 × 1,687.12
  4. Step 4: Simplify right side
    2,806.12x = 6,533,507.17
  5. Step 5: Solve for x
    x = 6,533,507.17/2,806.12
  6. Step 6: Final answer
    x = 2,328.31

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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.