Home / 28,206-42,309-11,790

Finding the Fourth Proportional to 28,206, 42,309 and 11,790

Calculator

Solution

The fourth proportional to 28,206, 42,309 and 11,790 is: 17,685

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,206 : 42,309 = 11,790 : x
  2. Step 2: Convert to fraction form
    28,206/42,309 = 11,790/x
  3. Step 3: Cross multiply
    28,206x = 42,309 × 11,790
  4. Step 4: Simplify right side
    28,206x = 498,823,110
  5. Step 5: Solve for x
    x = 498,823,110/28,206
  6. Step 6: Final answer
    x = 17,685

Related Problems

Find fourth proportional to 14,103, 21,154.50 and 5,895
Half scale
Find fourth proportional to 56,412, 84,618 and 23,580
Double scale
Find fourth proportional to 28,207, 42,310.50 and 11,791
Similar ratio
Find fourth proportional to 42,309, 63,463.50 and 17,685
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.