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Finding the Fourth Proportional to 3,999.62, 5,515.72 and 3,162.32

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Solution

The fourth proportional to 3,999.62, 5,515.72 and 3,162.32 is: 4,361.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.62 : 5,515.72 = 3,162.32 : x
  2. Step 2: Convert to fraction form
    3,999.62/5,515.72 = 3,162.32/x
  3. Step 3: Cross multiply
    3,999.62x = 5,515.72 × 3,162.32
  4. Step 4: Simplify right side
    3,999.62x = 17,442,471.67
  5. Step 5: Solve for x
    x = 17,442,471.67/3,999.62
  6. Step 6: Final answer
    x = 4,361.03

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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.