Home / 21,890-31,877

Finding the Third Proportional to 21,890 and 31,877

Calculator

Solution

The third proportional to 21,890 and 31,877 is: 46,420.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,890 : 31,877 = 31,877 : x
  2. Step 2: Convert to fraction form
    21,890/31,877 = 31,877/x
  3. Step 3: Cross multiply
    21,890x = 31,877 × 31,877
  4. Step 4: Simplify right side
    21,890x = 1,016,143,129
  5. Step 5: Solve for x
    x = 1,016,143,129/21,890
  6. Step 6: Final answer
    x = 46,420.43

Related Problems

Find third proportional to 10,945 and 15,938.50
Half scale
Find third proportional to 43,780 and 63,754
Double scale
Find third proportional to 21,892 and 31,880
Similar ratio
Find third proportional to 32,835 and 47,815.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.