Home / 8,458-12,687

Finding the Third Proportional to 8,458 and 12,687

Calculator

Solution

The third proportional to 8,458 and 12,687 is: 19,030.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,458 : 12,687 = 12,687 : x
  2. Step 2: Convert to fraction form
    8,458/12,687 = 12,687/x
  3. Step 3: Cross multiply
    8,458x = 12,687 × 12,687
  4. Step 4: Simplify right side
    8,458x = 160,959,969
  5. Step 5: Solve for x
    x = 160,959,969/8,458
  6. Step 6: Final answer
    x = 19,030.50

Related Problems

Find third proportional to 4,229 and 6,343.50
Half scale
Find third proportional to 16,916 and 25,374
Double scale
Find third proportional to 8,460 and 12,690
Similar ratio
Find third proportional to 12,687 and 19,030.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.