Home / 21,859.44-30,156.84-13,905.60

Finding the Fourth Proportional to 21,859.44, 30,156.84 and 13,905.60

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Solution

The fourth proportional to 21,859.44, 30,156.84 and 13,905.60 is: 19,183.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,859.44 : 30,156.84 = 13,905.60 : x
  2. Step 2: Convert to fraction form
    21,859.44/30,156.84 = 13,905.60/x
  3. Step 3: Cross multiply
    21,859.44x = 30,156.84 × 13,905.60
  4. Step 4: Simplify right side
    21,859.44x = 419,348,954.30
  5. Step 5: Solve for x
    x = 419,348,954.30/21,859.44
  6. Step 6: Final answer
    x = 19,183.88

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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.