How can I consolidate payday loan and installment loans together?

Contact a good debt management company to enroll in a debt consolidation program. The debt counselor will guide you.

you can ask the companies directly if they consolidate pdl and installment loans together

If it's a legal pdl, you can consolidate, or else you just have to pay the principal amount.
To consolidate, you can enroll in a consolidation program or take out a consolidation/personal loan to repay existing pdls and installment loans.
You can talk to a consolidation company to get an idea about the fee structure and how long it'll take to clear the debts.

First of all, you should understand what are the difference between installment loans and payday loans. With payday loan consolidation, you could have sufficient time for you to pay back your loan. The main benefit of the Installment Credits is that you will be able to receive the money at the lower interest rate and you realize how much you should pay off every month. There are many people who would prefer to have one monthly repayment rather than have to organize their debts and split the monthly repayments across the different lenders. With installment loans, it is also possible to freeze the amount of interest that you are paying and you could end up paying back a lot less money than if you worked at each loan separately.