Home / 7,720-18,078

Finding the Third Proportional to 7,720 and 18,078

Calculator

Solution

The third proportional to 7,720 and 18,078 is: 42,333.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720 : 18,078 = 18,078 : x
  2. Step 2: Convert to fraction form
    7,720/18,078 = 18,078/x
  3. Step 3: Cross multiply
    7,720x = 18,078 × 18,078
  4. Step 4: Simplify right side
    7,720x = 326,814,084
  5. Step 5: Solve for x
    x = 326,814,084/7,720
  6. Step 6: Final answer
    x = 42,333.43

Related Problems

Find third proportional to 3,860 and 9,039
Half scale
Find third proportional to 15,440 and 36,156
Double scale
Find third proportional to 7,722 and 18,083
Similar ratio
Find third proportional to 11,580 and 27,117
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.