Home / 21,713.82-29,972.79-13,212.06

Finding the Fourth Proportional to 21,713.82, 29,972.79 and 13,212.06

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Solution

The fourth proportional to 21,713.82, 29,972.79 and 13,212.06 is: 18,237.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,713.82 : 29,972.79 = 13,212.06 : x
  2. Step 2: Convert to fraction form
    21,713.82/29,972.79 = 13,212.06/x
  3. Step 3: Cross multiply
    21,713.82x = 29,972.79 × 13,212.06
  4. Step 4: Simplify right side
    21,713.82x = 396,002,299.85
  5. Step 5: Solve for x
    x = 396,002,299.85/21,713.82
  6. Step 6: Final answer
    x = 18,237.34

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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.