Home / 15,120-18,288

Finding the Third Proportional to 15,120 and 18,288

Calculator

Solution

The third proportional to 15,120 and 18,288 is: 22,119.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,120 : 18,288 = 18,288 : x
  2. Step 2: Convert to fraction form
    15,120/18,288 = 18,288/x
  3. Step 3: Cross multiply
    15,120x = 18,288 × 18,288
  4. Step 4: Simplify right side
    15,120x = 334,450,944
  5. Step 5: Solve for x
    x = 334,450,944/15,120
  6. Step 6: Final answer
    x = 22,119.77

Related Problems

Find third proportional to 7,560 and 9,144
Half scale
Find third proportional to 30,240 and 36,576
Double scale
Find third proportional to 15,122 and 18,290
Similar ratio
Find third proportional to 22,680 and 27,432
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.