Home / 15,708-18,108

Finding the Third Proportional to 15,708 and 18,108

Calculator

Solution

The third proportional to 15,708 and 18,108 is: 20,874.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,708 : 18,108 = 18,108 : x
  2. Step 2: Convert to fraction form
    15,708/18,108 = 18,108/x
  3. Step 3: Cross multiply
    15,708x = 18,108 × 18,108
  4. Step 4: Simplify right side
    15,708x = 327,899,664
  5. Step 5: Solve for x
    x = 327,899,664/15,708
  6. Step 6: Final answer
    x = 20,874.69

Related Problems

Find third proportional to 7,854 and 9,054
Half scale
Find third proportional to 31,416 and 36,216
Double scale
Find third proportional to 15,710 and 18,110
Similar ratio
Find third proportional to 23,562 and 27,162
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.