Home / 21,625.80-29,843.82-12,678.60

Finding the Fourth Proportional to 21,625.80, 29,843.82 and 12,678.60

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Solution

The fourth proportional to 21,625.80, 29,843.82 and 12,678.60 is: 17,496.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,625.80 : 29,843.82 = 12,678.60 : x
  2. Step 2: Convert to fraction form
    21,625.80/29,843.82 = 12,678.60/x
  3. Step 3: Cross multiply
    21,625.80x = 29,843.82 × 12,678.60
  4. Step 4: Simplify right side
    21,625.80x = 378,377,856.25
  5. Step 5: Solve for x
    x = 378,377,856.25/21,625.80
  6. Step 6: Final answer
    x = 17,496.59

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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.