Home / 3,515.82-5,261.55-2,128.32

Finding the Fourth Proportional to 3,515.82, 5,261.55 and 2,128.32

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Solution

The fourth proportional to 3,515.82, 5,261.55 and 2,128.32 is: 3,185.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,515.82 : 5,261.55 = 2,128.32 : x
  2. Step 2: Convert to fraction form
    3,515.82/5,261.55 = 2,128.32/x
  3. Step 3: Cross multiply
    3,515.82x = 5,261.55 × 2,128.32
  4. Step 4: Simplify right side
    3,515.82x = 11,198,262.10
  5. Step 5: Solve for x
    x = 11,198,262.10/3,515.82
  6. Step 6: Final answer
    x = 3,185.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.