Home / 8,280-12,459

Finding the Third Proportional to 8,280 and 12,459

Calculator

Solution

The third proportional to 8,280 and 12,459 is: 18,747.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,280 : 12,459 = 12,459 : x
  2. Step 2: Convert to fraction form
    8,280/12,459 = 12,459/x
  3. Step 3: Cross multiply
    8,280x = 12,459 × 12,459
  4. Step 4: Simplify right side
    8,280x = 155,226,681
  5. Step 5: Solve for x
    x = 155,226,681/8,280
  6. Step 6: Final answer
    x = 18,747.18

Related Problems

Find third proportional to 4,140 and 6,229.50
Half scale
Find third proportional to 16,560 and 24,918
Double scale
Find third proportional to 8,282 and 12,462
Similar ratio
Find third proportional to 12,420 and 18,688.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.