Home / 3,115-7,279

Finding the Third Proportional to 3,115 and 7,279

Calculator

Solution

The third proportional to 3,115 and 7,279 is: 17,009.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115 : 7,279 = 7,279 : x
  2. Step 2: Convert to fraction form
    3,115/7,279 = 7,279/x
  3. Step 3: Cross multiply
    3,115x = 7,279 × 7,279
  4. Step 4: Simplify right side
    3,115x = 52,983,841
  5. Step 5: Solve for x
    x = 52,983,841/3,115
  6. Step 6: Final answer
    x = 17,009.26

Related Problems

Find third proportional to 1,557.50 and 3,639.50
Half scale
Find third proportional to 6,230 and 14,558
Double scale
Find third proportional to 3,117 and 7,284
Similar ratio
Find third proportional to 4,672.50 and 10,918.50
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.