Home / 2,688-4,140

Finding the Third Proportional to 2,688 and 4,140

Calculator

Solution

The third proportional to 2,688 and 4,140 is: 6,376.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688 : 4,140 = 4,140 : x
  2. Step 2: Convert to fraction form
    2,688/4,140 = 4,140/x
  3. Step 3: Cross multiply
    2,688x = 4,140 × 4,140
  4. Step 4: Simplify right side
    2,688x = 17,139,600
  5. Step 5: Solve for x
    x = 17,139,600/2,688
  6. Step 6: Final answer
    x = 6,376.34

Related Problems

Find third proportional to 1,344 and 2,070
Half scale
Find third proportional to 5,376 and 8,280
Double scale
Find third proportional to 2,690 and 4,143
Similar ratio
Find third proportional to 4,032 and 6,210
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.