Home / 18,240-39,888

Finding the Third Proportional to 18,240 and 39,888

Calculator

Solution

The third proportional to 18,240 and 39,888 is: 87,228.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,240 : 39,888 = 39,888 : x
  2. Step 2: Convert to fraction form
    18,240/39,888 = 39,888/x
  3. Step 3: Cross multiply
    18,240x = 39,888 × 39,888
  4. Step 4: Simplify right side
    18,240x = 1,591,052,544
  5. Step 5: Solve for x
    x = 1,591,052,544/18,240
  6. Step 6: Final answer
    x = 87,228.76

Related Problems

Find third proportional to 9,120 and 19,944
Half scale
Find third proportional to 36,480 and 79,776
Double scale
Find third proportional to 18,242 and 39,892
Similar ratio
Find third proportional to 27,360 and 59,832
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.