Home / 3,106.27-4,285.80-2,161

Finding the Fourth Proportional to 3,106.27, 4,285.80 and 2,161

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Solution

The fourth proportional to 3,106.27, 4,285.80 and 2,161 is: 2,981.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.27 : 4,285.80 = 2,161 : x
  2. Step 2: Convert to fraction form
    3,106.27/4,285.80 = 2,161/x
  3. Step 3: Cross multiply
    3,106.27x = 4,285.80 × 2,161
  4. Step 4: Simplify right side
    3,106.27x = 9,261,613.80
  5. Step 5: Solve for x
    x = 9,261,613.80/3,106.27
  6. Step 6: Final answer
    x = 2,981.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.