Home / 8,909-13,911

Finding the Third Proportional to 8,909 and 13,911

Calculator

Solution

The third proportional to 8,909 and 13,911 is: 21,721.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,909 : 13,911 = 13,911 : x
  2. Step 2: Convert to fraction form
    8,909/13,911 = 13,911/x
  3. Step 3: Cross multiply
    8,909x = 13,911 × 13,911
  4. Step 4: Simplify right side
    8,909x = 193,515,921
  5. Step 5: Solve for x
    x = 193,515,921/8,909
  6. Step 6: Final answer
    x = 21,721.40

Related Problems

Find third proportional to 4,454.50 and 6,955.50
Half scale
Find third proportional to 17,818 and 27,822
Double scale
Find third proportional to 8,911 and 13,914
Similar ratio
Find third proportional to 13,363.50 and 20,866.50
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.