Home / 20,970-28,495

Finding the Third Proportional to 20,970 and 28,495

Calculator

Solution

The third proportional to 20,970 and 28,495 is: 38,720.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970 : 28,495 = 28,495 : x
  2. Step 2: Convert to fraction form
    20,970/28,495 = 28,495/x
  3. Step 3: Cross multiply
    20,970x = 28,495 × 28,495
  4. Step 4: Simplify right side
    20,970x = 811,965,025
  5. Step 5: Solve for x
    x = 811,965,025/20,970
  6. Step 6: Final answer
    x = 38,720.32

Related Problems

Find third proportional to 10,485 and 14,247.50
Half scale
Find third proportional to 41,940 and 56,990
Double scale
Find third proportional to 20,972 and 28,498
Similar ratio
Find third proportional to 31,455 and 42,742.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.