Home / 5,439-12,639

Finding the Third Proportional to 5,439 and 12,639

Calculator

Solution

The third proportional to 5,439 and 12,639 is: 29,370.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,439 : 12,639 = 12,639 : x
  2. Step 2: Convert to fraction form
    5,439/12,639 = 12,639/x
  3. Step 3: Cross multiply
    5,439x = 12,639 × 12,639
  4. Step 4: Simplify right side
    5,439x = 159,744,321
  5. Step 5: Solve for x
    x = 159,744,321/5,439
  6. Step 6: Final answer
    x = 29,370.16

Related Problems

Find third proportional to 2,719.50 and 6,319.50
Half scale
Find third proportional to 10,878 and 25,278
Double scale
Find third proportional to 5,441 and 12,644
Similar ratio
Find third proportional to 8,158.50 and 18,958.50
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.