  We report the application of Titius-Bode's law on 43 exoplanetary systems
containing four or more planets. Due to the fact that most of these systems
have their planets located within compact regions extending for less than the
semi-major axis of Mercury we found the necessity to scale down the Titius-Bode
law in each case. In this short article we present sample calculations for
three systems out of the whole set. Results show that all systems studied are
verifying the applicability of the law with high accuracy. Consequently our
investigation verifies practically the scale invariance of Titius-Bode law. The
results of this study buildup the confidence in predicting positions of the
exoplanets according to Titius-Bode's law besides enabling diagnosing possible
reasons of deviations.
