Home / 18,688-40,640

Finding the Third Proportional to 18,688 and 40,640

Calculator

Solution

The third proportional to 18,688 and 40,640 is: 88,378.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,688 : 40,640 = 40,640 : x
  2. Step 2: Convert to fraction form
    18,688/40,640 = 40,640/x
  3. Step 3: Cross multiply
    18,688x = 40,640 × 40,640
  4. Step 4: Simplify right side
    18,688x = 1,651,609,600
  5. Step 5: Solve for x
    x = 1,651,609,600/18,688
  6. Step 6: Final answer
    x = 88,378.08

Related Problems

Find third proportional to 9,344 and 20,320
Half scale
Find third proportional to 37,376 and 81,280
Double scale
Find third proportional to 18,690 and 40,644
Similar ratio
Find third proportional to 28,032 and 60,960
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.