Home / 15,878-17,318

Finding the Third Proportional to 15,878 and 17,318

Calculator

Solution

The third proportional to 15,878 and 17,318 is: 18,888.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,878 : 17,318 = 17,318 : x
  2. Step 2: Convert to fraction form
    15,878/17,318 = 17,318/x
  3. Step 3: Cross multiply
    15,878x = 17,318 × 17,318
  4. Step 4: Simplify right side
    15,878x = 299,913,124
  5. Step 5: Solve for x
    x = 299,913,124/15,878
  6. Step 6: Final answer
    x = 18,888.60

Related Problems

Find third proportional to 7,939 and 8,659
Half scale
Find third proportional to 31,756 and 34,636
Double scale
Find third proportional to 15,880 and 17,320
Similar ratio
Find third proportional to 23,817 and 25,977
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.