Home / 76,658-114,987-21,254

Finding the Fourth Proportional to 76,658, 114,987 and 21,254

Calculator

Solution

The fourth proportional to 76,658, 114,987 and 21,254 is: 31,881

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,658 : 114,987 = 21,254 : x
  2. Step 2: Convert to fraction form
    76,658/114,987 = 21,254/x
  3. Step 3: Cross multiply
    76,658x = 114,987 × 21,254
  4. Step 4: Simplify right side
    76,658x = 2,443,933,698
  5. Step 5: Solve for x
    x = 2,443,933,698/76,658
  6. Step 6: Final answer
    x = 31,881

Related Problems

Find fourth proportional to 38,329, 57,493.50 and 10,627
Half scale
Find fourth proportional to 153,316, 229,974 and 42,508
Double scale
Find fourth proportional to 76,659, 114,988.50 and 21,255
Similar ratio
Find fourth proportional to 114,987, 172,480.50 and 31,881
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.