Home / 2,108.69-3,175.67-1,921.85

Finding the Fourth Proportional to 2,108.69, 3,175.67 and 1,921.85

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Solution

The fourth proportional to 2,108.69, 3,175.67 and 1,921.85 is: 2,894.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.69 : 3,175.67 = 1,921.85 : x
  2. Step 2: Convert to fraction form
    2,108.69/3,175.67 = 1,921.85/x
  3. Step 3: Cross multiply
    2,108.69x = 3,175.67 × 1,921.85
  4. Step 4: Simplify right side
    2,108.69x = 6,103,161.39
  5. Step 5: Solve for x
    x = 6,103,161.39/2,108.69
  6. Step 6: Final answer
    x = 2,894.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.