Home / 5,460-12,690

Finding the Third Proportional to 5,460 and 12,690

Calculator

Solution

The third proportional to 5,460 and 12,690 is: 29,493.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,460 : 12,690 = 12,690 : x
  2. Step 2: Convert to fraction form
    5,460/12,690 = 12,690/x
  3. Step 3: Cross multiply
    5,460x = 12,690 × 12,690
  4. Step 4: Simplify right side
    5,460x = 161,036,100
  5. Step 5: Solve for x
    x = 161,036,100/5,460
  6. Step 6: Final answer
    x = 29,493.79

Related Problems

Find third proportional to 2,730 and 6,345
Half scale
Find third proportional to 10,920 and 25,380
Double scale
Find third proportional to 5,462 and 12,695
Similar ratio
Find third proportional to 8,190 and 19,035
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.