Home / 70,556-105,834-21,308

Finding the Fourth Proportional to 70,556, 105,834 and 21,308

Calculator

Solution

The fourth proportional to 70,556, 105,834 and 21,308 is: 31,962

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,556 : 105,834 = 21,308 : x
  2. Step 2: Convert to fraction form
    70,556/105,834 = 21,308/x
  3. Step 3: Cross multiply
    70,556x = 105,834 × 21,308
  4. Step 4: Simplify right side
    70,556x = 2,255,110,872
  5. Step 5: Solve for x
    x = 2,255,110,872/70,556
  6. Step 6: Final answer
    x = 31,962

Related Problems

Find fourth proportional to 35,278, 52,917 and 10,654
Half scale
Find fourth proportional to 141,112, 211,668 and 42,616
Double scale
Find fourth proportional to 70,557, 105,835.50 and 21,309
Similar ratio
Find fourth proportional to 105,834, 158,751 and 31,962
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.