Home / 2,121.62-3,178.17-1,012.11

Finding the Fourth Proportional to 2,121.62, 3,178.17 and 1,012.11

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Solution

The fourth proportional to 2,121.62, 3,178.17 and 1,012.11 is: 1,516.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.62 : 3,178.17 = 1,012.11 : x
  2. Step 2: Convert to fraction form
    2,121.62/3,178.17 = 1,012.11/x
  3. Step 3: Cross multiply
    2,121.62x = 3,178.17 × 1,012.11
  4. Step 4: Simplify right side
    2,121.62x = 3,216,645.72
  5. Step 5: Solve for x
    x = 3,216,645.72/2,121.62
  6. Step 6: Final answer
    x = 1,516.13

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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.