Home / 6,390-11,340

Finding the Third Proportional to 6,390 and 11,340

Calculator

Solution

The third proportional to 6,390 and 11,340 is: 20,124.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390 : 11,340 = 11,340 : x
  2. Step 2: Convert to fraction form
    6,390/11,340 = 11,340/x
  3. Step 3: Cross multiply
    6,390x = 11,340 × 11,340
  4. Step 4: Simplify right side
    6,390x = 128,595,600
  5. Step 5: Solve for x
    x = 128,595,600/6,390
  6. Step 6: Final answer
    x = 20,124.51

Related Problems

Find third proportional to 3,195 and 5,670
Half scale
Find third proportional to 12,780 and 22,680
Double scale
Find third proportional to 6,392 and 11,344
Similar ratio
Find third proportional to 9,585 and 17,010
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.77) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.