Home / 20,411-28,890

Finding the Third Proportional to 20,411 and 28,890

Calculator

Solution

The third proportional to 20,411 and 28,890 is: 40,891.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411 : 28,890 = 28,890 : x
  2. Step 2: Convert to fraction form
    20,411/28,890 = 28,890/x
  3. Step 3: Cross multiply
    20,411x = 28,890 × 28,890
  4. Step 4: Simplify right side
    20,411x = 834,632,100
  5. Step 5: Solve for x
    x = 834,632,100/20,411
  6. Step 6: Final answer
    x = 40,891.29

Related Problems

Find third proportional to 10,205.50 and 14,445
Half scale
Find third proportional to 40,822 and 57,780
Double scale
Find third proportional to 20,413 and 28,893
Similar ratio
Find third proportional to 30,616.50 and 43,335
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.