Home / 10,939.71-15,102-7,421.49

Finding the Fourth Proportional to 10,939.71, 15,102 and 7,421.49

Calculator

Solution

The fourth proportional to 10,939.71, 15,102 and 7,421.49 is: 10,245.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,939.71 : 15,102 = 7,421.49 : x
  2. Step 2: Convert to fraction form
    10,939.71/15,102 = 7,421.49/x
  3. Step 3: Cross multiply
    10,939.71x = 15,102 × 7,421.49
  4. Step 4: Simplify right side
    10,939.71x = 112,079,341.98
  5. Step 5: Solve for x
    x = 112,079,341.98/10,939.71
  6. Step 6: Final answer
    x = 10,245.18

Related Problems

Find fourth proportional to 5,469.86, 7,551 and 3,710.75
Half scale
Find fourth proportional to 21,879.42, 30,204 and 14,842.98
Double scale
Find fourth proportional to 10,940.71, 15,103.38 and 7,422.49
Similar ratio
Find fourth proportional to 16,409.57, 22,653 and 11,132.24
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.