Home / 20,912.75-28,858.59-11,961.24

Finding the Fourth Proportional to 20,912.75, 28,858.59 and 11,961.24

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Solution

The fourth proportional to 20,912.75, 28,858.59 and 11,961.24 is: 16,505.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.75 : 28,858.59 = 11,961.24 : x
  2. Step 2: Convert to fraction form
    20,912.75/28,858.59 = 11,961.24/x
  3. Step 3: Cross multiply
    20,912.75x = 28,858.59 × 11,961.24
  4. Step 4: Simplify right side
    20,912.75x = 345,184,521.05
  5. Step 5: Solve for x
    x = 345,184,521.05/20,912.75
  6. Step 6: Final answer
    x = 16,505.93

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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.