Home / 21,717.44-29,991.90-18,716.48

Finding the Fourth Proportional to 21,717.44, 29,991.90 and 18,716.48

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Solution

The fourth proportional to 21,717.44, 29,991.90 and 18,716.48 is: 25,847.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,717.44 : 29,991.90 = 18,716.48 : x
  2. Step 2: Convert to fraction form
    21,717.44/29,991.90 = 18,716.48/x
  3. Step 3: Cross multiply
    21,717.44x = 29,991.90 × 18,716.48
  4. Step 4: Simplify right side
    21,717.44x = 561,342,796.51
  5. Step 5: Solve for x
    x = 561,342,796.51/21,717.44
  6. Step 6: Final answer
    x = 25,847.56

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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.