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Finding the Fourth Proportional to 3,993.32, 5,989.98 and 3,987.55

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Solution

The fourth proportional to 3,993.32, 5,989.98 and 3,987.55 is: 5,981.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,993.32 : 5,989.98 = 3,987.55 : x
  2. Step 2: Convert to fraction form
    3,993.32/5,989.98 = 3,987.55/x
  3. Step 3: Cross multiply
    3,993.32x = 5,989.98 × 3,987.55
  4. Step 4: Simplify right side
    3,993.32x = 23,885,333.50
  5. Step 5: Solve for x
    x = 23,885,333.50/3,993.32
  6. Step 6: Final answer
    x = 5,981.33

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Similar ratio
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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.