Home / 20,997.55-28,976.62-11,566.11

Finding the Fourth Proportional to 20,997.55, 28,976.62 and 11,566.11

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Solution

The fourth proportional to 20,997.55, 28,976.62 and 11,566.11 is: 15,961.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.55 : 28,976.62 = 11,566.11 : x
  2. Step 2: Convert to fraction form
    20,997.55/28,976.62 = 11,566.11/x
  3. Step 3: Cross multiply
    20,997.55x = 28,976.62 × 11,566.11
  4. Step 4: Simplify right side
    20,997.55x = 335,146,745.43
  5. Step 5: Solve for x
    x = 335,146,745.43/20,997.55
  6. Step 6: Final answer
    x = 15,961.23

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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.