Home / 19,920-28,368

Finding the Third Proportional to 19,920 and 28,368

Calculator

Solution

The third proportional to 19,920 and 28,368 is: 40,398.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920 : 28,368 = 28,368 : x
  2. Step 2: Convert to fraction form
    19,920/28,368 = 28,368/x
  3. Step 3: Cross multiply
    19,920x = 28,368 × 28,368
  4. Step 4: Simplify right side
    19,920x = 804,743,424
  5. Step 5: Solve for x
    x = 804,743,424/19,920
  6. Step 6: Final answer
    x = 40,398.77

Related Problems

Find third proportional to 9,960 and 14,184
Half scale
Find third proportional to 39,840 and 56,736
Double scale
Find third proportional to 19,922 and 28,371
Similar ratio
Find third proportional to 29,880 and 42,552
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.