Home / 3,131-4,890

Finding the Third Proportional to 3,131 and 4,890

Calculator

Solution

The third proportional to 3,131 and 4,890 is: 7,637.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131 : 4,890 = 4,890 : x
  2. Step 2: Convert to fraction form
    3,131/4,890 = 4,890/x
  3. Step 3: Cross multiply
    3,131x = 4,890 × 4,890
  4. Step 4: Simplify right side
    3,131x = 23,912,100
  5. Step 5: Solve for x
    x = 23,912,100/3,131
  6. Step 6: Final answer
    x = 7,637.21

Related Problems

Find third proportional to 1,565.50 and 2,445
Half scale
Find third proportional to 6,262 and 9,780
Double scale
Find third proportional to 3,133 and 4,893
Similar ratio
Find third proportional to 4,696.50 and 7,335
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.