Home / 12,858-15,558

Finding the Third Proportional to 12,858 and 15,558

Calculator

Solution

The third proportional to 12,858 and 15,558 is: 18,824.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,858 : 15,558 = 15,558 : x
  2. Step 2: Convert to fraction form
    12,858/15,558 = 15,558/x
  3. Step 3: Cross multiply
    12,858x = 15,558 × 15,558
  4. Step 4: Simplify right side
    12,858x = 242,051,364
  5. Step 5: Solve for x
    x = 242,051,364/12,858
  6. Step 6: Final answer
    x = 18,824.96

Related Problems

Find third proportional to 6,429 and 7,779
Half scale
Find third proportional to 25,716 and 31,116
Double scale
Find third proportional to 12,860 and 15,560
Similar ratio
Find third proportional to 19,287 and 23,337
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.