Home / 21,067.08-29,073.82-12,115.57

Finding the Fourth Proportional to 21,067.08, 29,073.82 and 12,115.57

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Solution

The fourth proportional to 21,067.08, 29,073.82 and 12,115.57 is: 16,720.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,067.08 : 29,073.82 = 12,115.57 : x
  2. Step 2: Convert to fraction form
    21,067.08/29,073.82 = 12,115.57/x
  3. Step 3: Cross multiply
    21,067.08x = 29,073.82 × 12,115.57
  4. Step 4: Simplify right side
    21,067.08x = 352,245,901.38
  5. Step 5: Solve for x
    x = 352,245,901.38/21,067.08
  6. Step 6: Final answer
    x = 16,720.21

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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.