Home / 21,600-51,516

Finding the Third Proportional to 21,600 and 51,516

Calculator

Solution

The third proportional to 21,600 and 51,516 is: 122,865.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,600 : 51,516 = 51,516 : x
  2. Step 2: Convert to fraction form
    21,600/51,516 = 51,516/x
  3. Step 3: Cross multiply
    21,600x = 51,516 × 51,516
  4. Step 4: Simplify right side
    21,600x = 2,653,898,256
  5. Step 5: Solve for x
    x = 2,653,898,256/21,600
  6. Step 6: Final answer
    x = 122,865.66

Related Problems

Find third proportional to 10,800 and 25,758
Half scale
Find third proportional to 43,200 and 103,032
Double scale
Find third proportional to 21,602 and 51,521
Similar ratio
Find third proportional to 32,400 and 77,274
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.