Home / 2,081.13-3,121.70-1,316.49

Finding the Fourth Proportional to 2,081.13, 3,121.70 and 1,316.49

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Solution

The fourth proportional to 2,081.13, 3,121.70 and 1,316.49 is: 1,974.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.13 : 3,121.70 = 1,316.49 : x
  2. Step 2: Convert to fraction form
    2,081.13/3,121.70 = 1,316.49/x
  3. Step 3: Cross multiply
    2,081.13x = 3,121.70 × 1,316.49
  4. Step 4: Simplify right side
    2,081.13x = 4,109,680.25
  5. Step 5: Solve for x
    x = 4,109,680.25/2,081.13
  6. Step 6: Final answer
    x = 1,974.74

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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.