Home / 12,840-29,715

Finding the Third Proportional to 12,840 and 29,715

Calculator

Solution

The third proportional to 12,840 and 29,715 is: 68,768.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,840 : 29,715 = 29,715 : x
  2. Step 2: Convert to fraction form
    12,840/29,715 = 29,715/x
  3. Step 3: Cross multiply
    12,840x = 29,715 × 29,715
  4. Step 4: Simplify right side
    12,840x = 882,981,225
  5. Step 5: Solve for x
    x = 882,981,225/12,840
  6. Step 6: Final answer
    x = 68,768.01

Related Problems

Find third proportional to 6,420 and 14,857.50
Half scale
Find third proportional to 25,680 and 59,430
Double scale
Find third proportional to 12,842 and 29,720
Similar ratio
Find third proportional to 19,260 and 44,572.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.