About this printable
Practice equivalent ratio missing number with eight focused questions and a separate printable answer key. Each exercise has space for a written method, and the answers also appear as readable text below. Use the practice page first, then compare methods as well as final answers. The paired images stay together in this article so the solution can be found without searching for another post.
How to use it
Scale both parts of a ratio by the same factor. For example, 2:3 = x:12 gives x = 8 because the second part was multiplied by four. Identify which corresponding quantities you are comparing before calculating.
Check and adapt
Substitute the result into the ratio and check both cross-products. The exercises use positive whole numbers and exact whole-number solutions. This task extends ratio simplification by asking for a missing quantity rather than reducing a given pair.
Answers in text
- 2:4 = x:8: 4.
- 3:5 = x:15: 9.
- 4:6 = x:24: 16.
- 5:7 = x:14: 10.
- 6:8 = x:24: 18.
- 7:9 = x:36: 28.
- 8:10 = x:20: 16.
- 9:11 = x:33: 27.
Printable answer key
Download and printing instructions
Use Download image to save the original high-resolution PNG. To make a PDF, choose US Letter or A4 below the image and select Download PDF. The website creates that file in your browser; no separate PDF attachment is needed. Match the printer paper setting to your choice, use uniform scaling and check that every edge fits inside the printable area. Print one test copy before making a classroom set. These are flat printable pages, not editable forms. Originals are for personal and classroom use; share the article link rather than redistributing the files.