Home / 20,890-28,647

Finding the Third Proportional to 20,890 and 28,647

Calculator

Solution

The third proportional to 20,890 and 28,647 is: 39,284.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890 : 28,647 = 28,647 : x
  2. Step 2: Convert to fraction form
    20,890/28,647 = 28,647/x
  3. Step 3: Cross multiply
    20,890x = 28,647 × 28,647
  4. Step 4: Simplify right side
    20,890x = 820,650,609
  5. Step 5: Solve for x
    x = 820,650,609/20,890
  6. Step 6: Final answer
    x = 39,284.38

Related Problems

Find third proportional to 10,445 and 14,323.50
Half scale
Find third proportional to 41,780 and 57,294
Double scale
Find third proportional to 20,892 and 28,650
Similar ratio
Find third proportional to 31,335 and 42,970.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.