[
  "For equivalent ratios, find the multiplier or divisor that connects the two known corresponding terms on the same side.",
  "The left side changed from 14 to 42: 42 / 14 = 3, so multiply by 3. Apply the same to the right: 6 x 3 = 18.",
  "The missing term is 18. So 42 : 18 = 14 : 6."
]