What are the next three terms in the sequence 12288, 3072, 768, 192?

3072 / 12288 = 0.25

768 / 3072 = 0.25

192 / 768 = 0.25

This is Geometric progression wit common ratio r = 0.25

Next three terms:

0.25 • 192 = 48

0.25 • 48 = 12

0.25 • 12 = 3