Home / 21,385-51,822

Finding the Third Proportional to 21,385 and 51,822

Calculator

Solution

The third proportional to 21,385 and 51,822 is: 125,579.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,385 : 51,822 = 51,822 : x
  2. Step 2: Convert to fraction form
    21,385/51,822 = 51,822/x
  3. Step 3: Cross multiply
    21,385x = 51,822 × 51,822
  4. Step 4: Simplify right side
    21,385x = 2,685,519,684
  5. Step 5: Solve for x
    x = 2,685,519,684/21,385
  6. Step 6: Final answer
    x = 125,579.60

Related Problems

Find third proportional to 10,692.50 and 25,911
Half scale
Find third proportional to 42,770 and 103,644
Double scale
Find third proportional to 21,387 and 51,827
Similar ratio
Find third proportional to 32,077.50 and 77,733
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.