Home / 8,718-13,521

Finding the Third Proportional to 8,718 and 13,521

Calculator

Solution

The third proportional to 8,718 and 13,521 is: 20,970.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718 : 13,521 = 13,521 : x
  2. Step 2: Convert to fraction form
    8,718/13,521 = 13,521/x
  3. Step 3: Cross multiply
    8,718x = 13,521 × 13,521
  4. Step 4: Simplify right side
    8,718x = 182,817,441
  5. Step 5: Solve for x
    x = 182,817,441/8,718
  6. Step 6: Final answer
    x = 20,970.11

Related Problems

Find third proportional to 4,359 and 6,760.50
Half scale
Find third proportional to 17,436 and 27,042
Double scale
Find third proportional to 8,720 and 13,524
Similar ratio
Find third proportional to 13,077 and 20,281.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.