Home / 13,218-20,457

Finding the Third Proportional to 13,218 and 20,457

Calculator

Solution

The third proportional to 13,218 and 20,457 is: 31,660.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218 : 20,457 = 20,457 : x
  2. Step 2: Convert to fraction form
    13,218/20,457 = 20,457/x
  3. Step 3: Cross multiply
    13,218x = 20,457 × 20,457
  4. Step 4: Simplify right side
    13,218x = 418,488,849
  5. Step 5: Solve for x
    x = 418,488,849/13,218
  6. Step 6: Final answer
    x = 31,660.53

Related Problems

Find third proportional to 6,609 and 10,228.50
Half scale
Find third proportional to 26,436 and 40,914
Double scale
Find third proportional to 13,220 and 20,460
Similar ratio
Find third proportional to 19,827 and 30,685.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.