Home / 3,115.03-4,292.25-2,118.58

Finding the Fourth Proportional to 3,115.03, 4,292.25 and 2,118.58

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Solution

The fourth proportional to 3,115.03, 4,292.25 and 2,118.58 is: 2,919.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.03 : 4,292.25 = 2,118.58 : x
  2. Step 2: Convert to fraction form
    3,115.03/4,292.25 = 2,118.58/x
  3. Step 3: Cross multiply
    3,115.03x = 4,292.25 × 2,118.58
  4. Step 4: Simplify right side
    3,115.03x = 9,093,475.01
  5. Step 5: Solve for x
    x = 9,093,475.01/3,115.03
  6. Step 6: Final answer
    x = 2,919.23

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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.