Home / 7,940-18,380

Finding the Third Proportional to 7,940 and 18,380

Calculator

Solution

The third proportional to 7,940 and 18,380 is: 42,547.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,940 : 18,380 = 18,380 : x
  2. Step 2: Convert to fraction form
    7,940/18,380 = 18,380/x
  3. Step 3: Cross multiply
    7,940x = 18,380 × 18,380
  4. Step 4: Simplify right side
    7,940x = 337,824,400
  5. Step 5: Solve for x
    x = 337,824,400/7,940
  6. Step 6: Final answer
    x = 42,547.15

Related Problems

Find third proportional to 3,970 and 9,190
Half scale
Find third proportional to 15,880 and 36,760
Double scale
Find third proportional to 7,942 and 18,385
Similar ratio
Find third proportional to 11,910 and 27,570
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.