Home / 17,856-39,215

Finding the Third Proportional to 17,856 and 39,215

Calculator

Solution

The third proportional to 17,856 and 39,215 is: 86,123.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,856 : 39,215 = 39,215 : x
  2. Step 2: Convert to fraction form
    17,856/39,215 = 39,215/x
  3. Step 3: Cross multiply
    17,856x = 39,215 × 39,215
  4. Step 4: Simplify right side
    17,856x = 1,537,816,225
  5. Step 5: Solve for x
    x = 1,537,816,225/17,856
  6. Step 6: Final answer
    x = 86,123.22

Related Problems

Find third proportional to 8,928 and 19,607.50
Half scale
Find third proportional to 35,712 and 78,430
Double scale
Find third proportional to 17,858 and 39,219
Similar ratio
Find third proportional to 26,784 and 58,822.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.