Home / 2,689.08-3,707.82-2,128.44

Finding the Fourth Proportional to 2,689.08, 3,707.82 and 2,128.44

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Solution

The fourth proportional to 2,689.08, 3,707.82 and 2,128.44 is: 2,934.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.08 : 3,707.82 = 2,128.44 : x
  2. Step 2: Convert to fraction form
    2,689.08/3,707.82 = 2,128.44/x
  3. Step 3: Cross multiply
    2,689.08x = 3,707.82 × 2,128.44
  4. Step 4: Simplify right side
    2,689.08x = 7,891,872.40
  5. Step 5: Solve for x
    x = 7,891,872.40/2,689.08
  6. Step 6: Final answer
    x = 2,934.79

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1.5x scale

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.