Home / 21,912.12-30,238.92-20,237.85

Finding the Fourth Proportional to 21,912.12, 30,238.92 and 20,237.85

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Solution

The fourth proportional to 21,912.12, 30,238.92 and 20,237.85 is: 27,928.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,912.12 : 30,238.92 = 20,237.85 : x
  2. Step 2: Convert to fraction form
    21,912.12/30,238.92 = 20,237.85/x
  3. Step 3: Cross multiply
    21,912.12x = 30,238.92 × 20,237.85
  4. Step 4: Simplify right side
    21,912.12x = 611,970,727.12
  5. Step 5: Solve for x
    x = 611,970,727.12/21,912.12
  6. Step 6: Final answer
    x = 27,928.41

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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.