Home / 20,889.36-28,825.44-11,936.84

Finding the Fourth Proportional to 20,889.36, 28,825.44 and 11,936.84

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Solution

The fourth proportional to 20,889.36, 28,825.44 and 11,936.84 is: 16,471.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.36 : 28,825.44 = 11,936.84 : x
  2. Step 2: Convert to fraction form
    20,889.36/28,825.44 = 11,936.84/x
  3. Step 3: Cross multiply
    20,889.36x = 28,825.44 × 11,936.84
  4. Step 4: Simplify right side
    20,889.36x = 344,084,665.21
  5. Step 5: Solve for x
    x = 344,084,665.21/20,889.36
  6. Step 6: Final answer
    x = 16,471.77

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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.