Home / 31,868-47,802-13,400

Finding the Fourth Proportional to 31,868, 47,802 and 13,400

Calculator

Solution

The fourth proportional to 31,868, 47,802 and 13,400 is: 20,100

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,868 : 47,802 = 13,400 : x
  2. Step 2: Convert to fraction form
    31,868/47,802 = 13,400/x
  3. Step 3: Cross multiply
    31,868x = 47,802 × 13,400
  4. Step 4: Simplify right side
    31,868x = 640,546,800
  5. Step 5: Solve for x
    x = 640,546,800/31,868
  6. Step 6: Final answer
    x = 20,100

Related Problems

Find fourth proportional to 15,934, 23,901 and 6,700
Half scale
Find fourth proportional to 63,736, 95,604 and 26,800
Double scale
Find fourth proportional to 31,869, 47,803.50 and 13,401
Similar ratio
Find fourth proportional to 47,802, 71,703 and 20,100
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.