A survey commissioned by Christian Broadcasting Network here reveals that contributors give $4 to other religious organizations for every dollar they give the network.

CBN, the largest producer of Christian religious programming, commissioned Market Research Group Inc., of Detroit, to take a 1,300-person sampling of their contributors.

The survey showed that nine out of 10 who give $10 or more a month to CBN said they are involved in a local church that receives their financial support first. Eighty percent of the contributors feel that such electronic ministries actually bolster local churches.

Asked why contributors send money to the network, one-third of the respondents said it was "to help spread the Gospel."

The research firm assured the network that financial support "will be forthcoming and will grow as long as the primary thrust of CBN is perceived to be spreading the Gospel to the world." The network had a 1978 budget of $58 million.

M. G. (Pat) Robertson, head of the network, said several different denominations support the work of his electronic ministry. He said this showed that "neither CBN nor other members of the electronic church are out to proselytize local church members."

However, National Council of Churches officials question the electronic church alternative.

"What worries me," said the Rev. William F. Fore, head of the NCC Communication Commission, "is whether the electronic church is in fact pulling people away from the local church, whether it is substituting an anonymous and therefore undemanding commitment for the kind of person-to-person involvement and group commitment that is the essence of the local church."

A rapidly growing field, the electronic church adds a radio station each week and a television station each month. There are now about 1,000 religious radio and TV stations in the U.S.

The average amount given to Christian Broadcasting Network by the donors surveyed was$190 a year -- plus a total of $864 per capita gift to religious causes.