Home / 21,147.94-29,170.92-13,604.09

Finding the Fourth Proportional to 21,147.94, 29,170.92 and 13,604.09

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Solution

The fourth proportional to 21,147.94, 29,170.92 and 13,604.09 is: 18,765.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.94 : 29,170.92 = 13,604.09 : x
  2. Step 2: Convert to fraction form
    21,147.94/29,170.92 = 13,604.09/x
  3. Step 3: Cross multiply
    21,147.94x = 29,170.92 × 13,604.09
  4. Step 4: Simplify right side
    21,147.94x = 396,843,821.06
  5. Step 5: Solve for x
    x = 396,843,821.06/21,147.94
  6. Step 6: Final answer
    x = 18,765.13

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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.