Home / 7,131-8,715

Finding the Third Proportional to 7,131 and 8,715

Calculator

Solution

The third proportional to 7,131 and 8,715 is: 10,650.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131 : 8,715 = 8,715 : x
  2. Step 2: Convert to fraction form
    7,131/8,715 = 8,715/x
  3. Step 3: Cross multiply
    7,131x = 8,715 × 8,715
  4. Step 4: Simplify right side
    7,131x = 75,951,225
  5. Step 5: Solve for x
    x = 75,951,225/7,131
  6. Step 6: Final answer
    x = 10,650.85

Related Problems

Find third proportional to 3,565.50 and 4,357.50
Half scale
Find third proportional to 14,262 and 17,430
Double scale
Find third proportional to 7,133 and 8,717
Similar ratio
Find third proportional to 10,696.50 and 13,072.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.