Home / 13,920-21,870

Finding the Third Proportional to 13,920 and 21,870

Calculator

Solution

The third proportional to 13,920 and 21,870 is: 34,360.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920 : 21,870 = 21,870 : x
  2. Step 2: Convert to fraction form
    13,920/21,870 = 21,870/x
  3. Step 3: Cross multiply
    13,920x = 21,870 × 21,870
  4. Step 4: Simplify right side
    13,920x = 478,296,900
  5. Step 5: Solve for x
    x = 478,296,900/13,920
  6. Step 6: Final answer
    x = 34,360.41

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.