Home / 20,361.25-28,100.19-11,979.37

Finding the Fourth Proportional to 20,361.25, 28,100.19 and 11,979.37

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Solution

The fourth proportional to 20,361.25, 28,100.19 and 11,979.37 is: 16,532.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,361.25 : 28,100.19 = 11,979.37 : x
  2. Step 2: Convert to fraction form
    20,361.25/28,100.19 = 11,979.37/x
  3. Step 3: Cross multiply
    20,361.25x = 28,100.19 × 11,979.37
  4. Step 4: Simplify right side
    20,361.25x = 336,622,573.08
  5. Step 5: Solve for x
    x = 336,622,573.08/20,361.25
  6. Step 6: Final answer
    x = 16,532.51

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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.