Home / 6,390-7,317

Finding the Third Proportional to 6,390 and 7,317

Calculator

Solution

The third proportional to 6,390 and 7,317 is: 8,378.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390 : 7,317 = 7,317 : x
  2. Step 2: Convert to fraction form
    6,390/7,317 = 7,317/x
  3. Step 3: Cross multiply
    6,390x = 7,317 × 7,317
  4. Step 4: Simplify right side
    6,390x = 53,538,489
  5. Step 5: Solve for x
    x = 53,538,489/6,390
  6. Step 6: Final answer
    x = 8,378.48

Related Problems

Find third proportional to 3,195 and 3,658.50
Half scale
Find third proportional to 12,780 and 14,634
Double scale
Find third proportional to 6,392 and 7,319
Similar ratio
Find third proportional to 9,585 and 10,975.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.