Home / 2,121.48-3,158.46-2,111.22

Finding the Fourth Proportional to 2,121.48, 3,158.46 and 2,111.22

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Solution

The fourth proportional to 2,121.48, 3,158.46 and 2,111.22 is: 3,143.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.48 : 3,158.46 = 2,111.22 : x
  2. Step 2: Convert to fraction form
    2,121.48/3,158.46 = 2,111.22/x
  3. Step 3: Cross multiply
    2,121.48x = 3,158.46 × 2,111.22
  4. Step 4: Simplify right side
    2,121.48x = 6,668,203.92
  5. Step 5: Solve for x
    x = 6,668,203.92/2,121.48
  6. Step 6: Final answer
    x = 3,143.18

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Half 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.