  We use double-mode RR Lyrae (RRd) stars from the MACHO variable star database
of the Large Magellanic Cloud (LMC) to estimate its distance, by utilizing
photometric data, linear pulsation and stellar atmosphere models. If we set
E_(B-V)=0.11 and [M/H]=-1.5 for LMC, we get M-m=18.52 mag, which is in
agreement with the value obtained from Galactic cluster RRd stars. Although the
formal statistical error (standard deviation) of M-m derived from the MACHO set
is only 0.024 mag, the systematic errors are more substantial. These errors are
mostly due to the zero point ambiguity of the temperature scale and to the
error of the photometric calibration. However, the fact that the distance
moduli obtained in this and in our former studies of cluster RRd and Small
Magellanic Cloud beat Cepheids agree so well, implies that the only serious
source of error is the zero point of the temperature scale, which should not
have larger than +/-0.10 mag effect on the distance modulus.
