Home / 2,172.30-3,257.20-1,912.82

Finding the Fourth Proportional to 2,172.30, 3,257.20 and 1,912.82

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Solution

The fourth proportional to 2,172.30, 3,257.20 and 1,912.82 is: 2,868.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.30 : 3,257.20 = 1,912.82 : x
  2. Step 2: Convert to fraction form
    2,172.30/3,257.20 = 1,912.82/x
  3. Step 3: Cross multiply
    2,172.30x = 3,257.20 × 1,912.82
  4. Step 4: Simplify right side
    2,172.30x = 6,230,437.30
  5. Step 5: Solve for x
    x = 6,230,437.30/2,172.30
  6. Step 6: Final answer
    x = 2,868.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.