Home / 20,918-29,820

Finding the Third Proportional to 20,918 and 29,820

Calculator

Solution

The third proportional to 20,918 and 29,820 is: 42,510.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918 : 29,820 = 29,820 : x
  2. Step 2: Convert to fraction form
    20,918/29,820 = 29,820/x
  3. Step 3: Cross multiply
    20,918x = 29,820 × 29,820
  4. Step 4: Simplify right side
    20,918x = 889,232,400
  5. Step 5: Solve for x
    x = 889,232,400/20,918
  6. Step 6: Final answer
    x = 42,510.39

Related Problems

Find third proportional to 10,459 and 14,910
Half scale
Find third proportional to 41,836 and 59,640
Double scale
Find third proportional to 20,920 and 29,823
Similar ratio
Find third proportional to 31,377 and 44,730
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.