Home / 21,020.88-29,020.68-13,956.96

Finding the Fourth Proportional to 21,020.88, 29,020.68 and 13,956.96

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Solution

The fourth proportional to 21,020.88, 29,020.68 and 13,956.96 is: 19,268.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020.88 : 29,020.68 = 13,956.96 : x
  2. Step 2: Convert to fraction form
    21,020.88/29,020.68 = 13,956.96/x
  3. Step 3: Cross multiply
    21,020.88x = 29,020.68 × 13,956.96
  4. Step 4: Simplify right side
    21,020.88x = 405,040,469.93
  5. Step 5: Solve for x
    x = 405,040,469.93/21,020.88
  6. Step 6: Final answer
    x = 19,268.48

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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.