Home / 11,976.80-17,965.20-3,656.90

Finding the Fourth Proportional to 11,976.80, 17,965.20 and 3,656.90

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Solution

The fourth proportional to 11,976.80, 17,965.20 and 3,656.90 is: 5,485.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,976.80 : 17,965.20 = 3,656.90 : x
  2. Step 2: Convert to fraction form
    11,976.80/17,965.20 = 3,656.90/x
  3. Step 3: Cross multiply
    11,976.80x = 17,965.20 × 3,656.90
  4. Step 4: Simplify right side
    11,976.80x = 65,696,939.88
  5. Step 5: Solve for x
    x = 65,696,939.88/11,976.80
  6. Step 6: Final answer
    x = 5,485.35

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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.