Home / 18,171-19,782

Finding the Third Proportional to 18,171 and 19,782

Calculator

Solution

The third proportional to 18,171 and 19,782 is: 21,535.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,171 : 19,782 = 19,782 : x
  2. Step 2: Convert to fraction form
    18,171/19,782 = 19,782/x
  3. Step 3: Cross multiply
    18,171x = 19,782 × 19,782
  4. Step 4: Simplify right side
    18,171x = 391,327,524
  5. Step 5: Solve for x
    x = 391,327,524/18,171
  6. Step 6: Final answer
    x = 21,535.83

Related Problems

Find third proportional to 9,085.50 and 9,891
Half scale
Find third proportional to 36,342 and 39,564
Double scale
Find third proportional to 18,173 and 19,784
Similar ratio
Find third proportional to 27,256.50 and 29,673
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.