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Finding the Fourth Proportional to 3,987.15, 5,968.36 and 3,396.66

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Solution

The fourth proportional to 3,987.15, 5,968.36 and 3,396.66 is: 5,084.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.15 : 5,968.36 = 3,396.66 : x
  2. Step 2: Convert to fraction form
    3,987.15/5,968.36 = 3,396.66/x
  3. Step 3: Cross multiply
    3,987.15x = 5,968.36 × 3,396.66
  4. Step 4: Simplify right side
    3,987.15x = 20,272,489.68
  5. Step 5: Solve for x
    x = 20,272,489.68/3,987.15
  6. Step 6: Final answer
    x = 5,084.46

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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.