Home / 21,138.64-31,723.34-17,028.27

Finding the Fourth Proportional to 21,138.64, 31,723.34 and 17,028.27

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Solution

The fourth proportional to 21,138.64, 31,723.34 and 17,028.27 is: 25,554.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.64 : 31,723.34 = 17,028.27 : x
  2. Step 2: Convert to fraction form
    21,138.64/31,723.34 = 17,028.27/x
  3. Step 3: Cross multiply
    21,138.64x = 31,723.34 × 17,028.27
  4. Step 4: Simplify right side
    21,138.64x = 540,193,513.68
  5. Step 5: Solve for x
    x = 540,193,513.68/21,138.64
  6. Step 6: Final answer
    x = 25,554.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.