Home / 26,489-39,738.36-12,638

Finding the Fourth Proportional to 26,489, 39,738.36 and 12,638

Calculator

Solution

The fourth proportional to 26,489, 39,738.36 and 12,638 is: 18,959.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,489 : 39,738.36 = 12,638 : x
  2. Step 2: Convert to fraction form
    26,489/39,738.36 = 12,638/x
  3. Step 3: Cross multiply
    26,489x = 39,738.36 × 12,638
  4. Step 4: Simplify right side
    26,489x = 502,213,393.68
  5. Step 5: Solve for x
    x = 502,213,393.68/26,489
  6. Step 6: Final answer
    x = 18,959.32

Related Problems

Find fourth proportional to 13,244.50, 19,869.18 and 6,319
Half scale
Find fourth proportional to 52,978, 79,476.72 and 25,276
Double scale
Find fourth proportional to 26,490, 39,739.86 and 12,639
Similar ratio
Find fourth proportional to 39,733.50, 59,607.54 and 18,957
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.