Home / 3,278-7,679

Finding the Third Proportional to 3,278 and 7,679

Calculator

Solution

The third proportional to 3,278 and 7,679 is: 17,988.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,278 : 7,679 = 7,679 : x
  2. Step 2: Convert to fraction form
    3,278/7,679 = 7,679/x
  3. Step 3: Cross multiply
    3,278x = 7,679 × 7,679
  4. Step 4: Simplify right side
    3,278x = 58,967,041
  5. Step 5: Solve for x
    x = 58,967,041/3,278
  6. Step 6: Final answer
    x = 17,988.73

Related Problems

Find third proportional to 1,639 and 3,839.50
Half scale
Find third proportional to 6,556 and 15,358
Double scale
Find third proportional to 3,280 and 7,684
Similar ratio
Find third proportional to 4,917 and 11,518.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.