Home / 4,020-7,440

Finding the Third Proportional to 4,020 and 7,440

Calculator

Solution

The third proportional to 4,020 and 7,440 is: 13,769.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,020 : 7,440 = 7,440 : x
  2. Step 2: Convert to fraction form
    4,020/7,440 = 7,440/x
  3. Step 3: Cross multiply
    4,020x = 7,440 × 7,440
  4. Step 4: Simplify right side
    4,020x = 55,353,600
  5. Step 5: Solve for x
    x = 55,353,600/4,020
  6. Step 6: Final answer
    x = 13,769.55

Related Problems

Find third proportional to 2,010 and 3,720
Half scale
Find third proportional to 8,040 and 14,880
Double scale
Find third proportional to 4,022 and 7,444
Similar ratio
Find third proportional to 6,030 and 11,160
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.85) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.