Home / 12,148-18,222-3,940

Finding the Fourth Proportional to 12,148, 18,222 and 3,940

Calculator

Solution

The fourth proportional to 12,148, 18,222 and 3,940 is: 5,910

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,148 : 18,222 = 3,940 : x
  2. Step 2: Convert to fraction form
    12,148/18,222 = 3,940/x
  3. Step 3: Cross multiply
    12,148x = 18,222 × 3,940
  4. Step 4: Simplify right side
    12,148x = 71,794,680
  5. Step 5: Solve for x
    x = 71,794,680/12,148
  6. Step 6: Final answer
    x = 5,910

Related Problems

Find fourth proportional to 6,074, 9,111 and 1,970
Half scale
Find fourth proportional to 24,296, 36,444 and 7,880
Double scale
Find fourth proportional to 12,149, 18,223.50 and 3,941
Similar ratio
Find fourth proportional to 18,222, 27,333 and 5,910
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.