Home / 7,911-18,318

Finding the Third Proportional to 7,911 and 18,318

Calculator

Solution

The third proportional to 7,911 and 18,318 is: 42,415.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911 : 18,318 = 18,318 : x
  2. Step 2: Convert to fraction form
    7,911/18,318 = 18,318/x
  3. Step 3: Cross multiply
    7,911x = 18,318 × 18,318
  4. Step 4: Simplify right side
    7,911x = 335,549,124
  5. Step 5: Solve for x
    x = 335,549,124/7,911
  6. Step 6: Final answer
    x = 42,415.51

Related Problems

Find third proportional to 3,955.50 and 9,159
Half scale
Find third proportional to 15,822 and 36,636
Double scale
Find third proportional to 7,913 and 18,323
Similar ratio
Find third proportional to 11,866.50 and 27,477
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.