Home / 13,921.68-20,791.44-11,152.56

Finding the Fourth Proportional to 13,921.68, 20,791.44 and 11,152.56

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Solution

The fourth proportional to 13,921.68, 20,791.44 and 11,152.56 is: 16,655.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,921.68 : 20,791.44 = 11,152.56 : x
  2. Step 2: Convert to fraction form
    13,921.68/20,791.44 = 11,152.56/x
  3. Step 3: Cross multiply
    13,921.68x = 20,791.44 × 11,152.56
  4. Step 4: Simplify right side
    13,921.68x = 231,877,782.09
  5. Step 5: Solve for x
    x = 231,877,782.09/13,921.68
  6. Step 6: Final answer
    x = 16,655.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.