Home / 30,489.86-42,019-21,977.26

Finding the Fourth Proportional to 30,489.86, 42,019 and 21,977.26

Calculator

Solution

The fourth proportional to 30,489.86, 42,019 and 21,977.26 is: 30,287.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,489.86 : 42,019 = 21,977.26 : x
  2. Step 2: Convert to fraction form
    30,489.86/42,019 = 21,977.26/x
  3. Step 3: Cross multiply
    30,489.86x = 42,019 × 21,977.26
  4. Step 4: Simplify right side
    30,489.86x = 923,462,487.94
  5. Step 5: Solve for x
    x = 923,462,487.94/30,489.86
  6. Step 6: Final answer
    x = 30,287.53

Related Problems

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.