Home / 5,278-7,917-2,200

Finding the Fourth Proportional to 5,278, 7,917 and 2,200

Calculator

Solution

The fourth proportional to 5,278, 7,917 and 2,200 is: 3,300

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278 : 7,917 = 2,200 : x
  2. Step 2: Convert to fraction form
    5,278/7,917 = 2,200/x
  3. Step 3: Cross multiply
    5,278x = 7,917 × 2,200
  4. Step 4: Simplify right side
    5,278x = 17,417,400
  5. Step 5: Solve for x
    x = 17,417,400/5,278
  6. Step 6: Final answer
    x = 3,300

Related Problems

Find fourth proportional to 2,639, 3,958.50 and 1,100
Half scale
Find fourth proportional to 10,556, 15,834 and 4,400
Double scale
Find fourth proportional to 5,279, 7,918.50 and 2,201
Similar ratio
Find fourth proportional to 7,917, 11,875.50 and 3,300
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.