Home / 15,634-21,218

Finding the Third Proportional to 15,634 and 21,218

Calculator

Solution

The third proportional to 15,634 and 21,218 is: 28,796.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,634 : 21,218 = 21,218 : x
  2. Step 2: Convert to fraction form
    15,634/21,218 = 21,218/x
  3. Step 3: Cross multiply
    15,634x = 21,218 × 21,218
  4. Step 4: Simplify right side
    15,634x = 450,203,524
  5. Step 5: Solve for x
    x = 450,203,524/15,634
  6. Step 6: Final answer
    x = 28,796.44

Related Problems

Find third proportional to 7,817 and 10,609
Half scale
Find third proportional to 31,268 and 42,436
Double scale
Find third proportional to 15,636 and 21,221
Similar ratio
Find third proportional to 23,451 and 31,827
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.