Home / 20,997.81-28,976.96-11,566.38

Finding the Fourth Proportional to 20,997.81, 28,976.96 and 11,566.38

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Solution

The fourth proportional to 20,997.81, 28,976.96 and 11,566.38 is: 15,961.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.81 : 28,976.96 = 11,566.38 : x
  2. Step 2: Convert to fraction form
    20,997.81/28,976.96 = 11,566.38/x
  3. Step 3: Cross multiply
    20,997.81x = 28,976.96 × 11,566.38
  4. Step 4: Simplify right side
    20,997.81x = 335,158,472.77
  5. Step 5: Solve for x
    x = 335,158,472.77/20,997.81
  6. Step 6: Final answer
    x = 15,961.59

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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.