[
  "For equivalent ratios, find the multiplier or divisor that connects the two known corresponding terms.",
  "The right side changed from 4 to 20: 20 / 4 = 5, so multiply by 5. Apply the same to the left: 7 x 5 = 35.",
  "The missing term is 35. So 7 : 4 = 35 : 20."
]