Home / 8,305,689-12,999,509

Finding the Third Proportional to 8,305,689 and 12,999,509

Calculator

Solution

The third proportional to 8,305,689 and 12,999,509 is: 20,345,962.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,305,689 : 12,999,509 = 12,999,509 : x
  2. Step 2: Convert to fraction form
    8,305,689/12,999,509 = 12,999,509/x
  3. Step 3: Cross multiply
    8,305,689x = 12,999,509 × 12,999,509
  4. Step 4: Simplify right side
    8,305,689x = 168,987,234,241,081
  5. Step 5: Solve for x
    x = 168,987,234,241,081/8,305,689
  6. Step 6: Final answer
    x = 20,345,962.18

Related Problems

Find third proportional to 4,152,844.50 and 6,499,754.50
Half scale
Find third proportional to 16,611,378 and 25,999,018
Double scale
Find third proportional to 8,305,691 and 12,999,512
Similar ratio
Find third proportional to 12,458,533.50 and 19,499,263.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.