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Finding the Fourth Proportional to 8,992.14, 13,480.44 and 3,990.79

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Solution

The fourth proportional to 8,992.14, 13,480.44 and 3,990.79 is: 5,982.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,992.14 : 13,480.44 = 3,990.79 : x
  2. Step 2: Convert to fraction form
    8,992.14/13,480.44 = 3,990.79/x
  3. Step 3: Cross multiply
    8,992.14x = 13,480.44 × 3,990.79
  4. Step 4: Simplify right side
    8,992.14x = 53,797,605.15
  5. Step 5: Solve for x
    x = 53,797,605.15/8,992.14
  6. Step 6: Final answer
    x = 5,982.74

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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.