Home / 12,652-18,978-3,418

Finding the Fourth Proportional to 12,652, 18,978 and 3,418

Calculator

Solution

The fourth proportional to 12,652, 18,978 and 3,418 is: 5,127

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,652 : 18,978 = 3,418 : x
  2. Step 2: Convert to fraction form
    12,652/18,978 = 3,418/x
  3. Step 3: Cross multiply
    12,652x = 18,978 × 3,418
  4. Step 4: Simplify right side
    12,652x = 64,866,804
  5. Step 5: Solve for x
    x = 64,866,804/12,652
  6. Step 6: Final answer
    x = 5,127

Related Problems

Find fourth proportional to 6,326, 9,489 and 1,709
Half scale
Find fourth proportional to 25,304, 37,956 and 6,836
Double scale
Find fourth proportional to 12,653, 18,979.50 and 3,419
Similar ratio
Find fourth proportional to 18,978, 28,467 and 5,127
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.