Home / 21,912.82-30,235.44-13,416.88

Finding the Fourth Proportional to 21,912.82, 30,235.44 and 13,416.88

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Solution

The fourth proportional to 21,912.82, 30,235.44 and 13,416.88 is: 18,512.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,912.82 : 30,235.44 = 13,416.88 : x
  2. Step 2: Convert to fraction form
    21,912.82/30,235.44 = 13,416.88/x
  3. Step 3: Cross multiply
    21,912.82x = 30,235.44 × 13,416.88
  4. Step 4: Simplify right side
    21,912.82x = 405,665,270.23
  5. Step 5: Solve for x
    x = 405,665,270.23/21,912.82
  6. Step 6: Final answer
    x = 18,512.69

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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.