Home / 15,674-21,288

Finding the Third Proportional to 15,674 and 21,288

Calculator

Solution

The third proportional to 15,674 and 21,288 is: 28,912.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,674 : 21,288 = 21,288 : x
  2. Step 2: Convert to fraction form
    15,674/21,288 = 21,288/x
  3. Step 3: Cross multiply
    15,674x = 21,288 × 21,288
  4. Step 4: Simplify right side
    15,674x = 453,178,944
  5. Step 5: Solve for x
    x = 453,178,944/15,674
  6. Step 6: Final answer
    x = 28,912.78

Related Problems

Find third proportional to 7,837 and 10,644
Half scale
Find third proportional to 31,348 and 42,576
Double scale
Find third proportional to 15,676 and 21,291
Similar ratio
Find third proportional to 23,511 and 31,932
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.