Home / 2,121.62-3,166.97-1,965.28

Finding the Fourth Proportional to 2,121.62, 3,166.97 and 1,965.28

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Solution

The fourth proportional to 2,121.62, 3,166.97 and 1,965.28 is: 2,933.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.62 : 3,166.97 = 1,965.28 : x
  2. Step 2: Convert to fraction form
    2,121.62/3,166.97 = 1,965.28/x
  3. Step 3: Cross multiply
    2,121.62x = 3,166.97 × 1,965.28
  4. Step 4: Simplify right side
    2,121.62x = 6,223,982.80
  5. Step 5: Solve for x
    x = 6,223,982.80/2,121.62
  6. Step 6: Final answer
    x = 2,933.60

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.