Home / 2,115.16-3,172.62-1,254.94

Finding the Fourth Proportional to 2,115.16, 3,172.62 and 1,254.94

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Solution

The fourth proportional to 2,115.16, 3,172.62 and 1,254.94 is: 1,882.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.16 : 3,172.62 = 1,254.94 : x
  2. Step 2: Convert to fraction form
    2,115.16/3,172.62 = 1,254.94/x
  3. Step 3: Cross multiply
    2,115.16x = 3,172.62 × 1,254.94
  4. Step 4: Simplify right side
    2,115.16x = 3,981,447.74
  5. Step 5: Solve for x
    x = 3,981,447.74/2,115.16
  6. Step 6: Final answer
    x = 1,882.34

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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.