Home / 9,135-18,990

Finding the Third Proportional to 9,135 and 18,990

Calculator

Solution

The third proportional to 9,135 and 18,990 is: 39,476.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,135 : 18,990 = 18,990 : x
  2. Step 2: Convert to fraction form
    9,135/18,990 = 18,990/x
  3. Step 3: Cross multiply
    9,135x = 18,990 × 18,990
  4. Step 4: Simplify right side
    9,135x = 360,620,100
  5. Step 5: Solve for x
    x = 360,620,100/9,135
  6. Step 6: Final answer
    x = 39,476.75

Related Problems

Find third proportional to 4,567.50 and 9,495
Half scale
Find third proportional to 18,270 and 37,980
Double scale
Find third proportional to 9,137 and 18,994
Similar ratio
Find third proportional to 13,702.50 and 28,485
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.