Home / 45.98-68.90-21.88

Finding the Fourth Proportional to 45.98, 68.90 and 21.88

Calculator

Solution

The fourth proportional to 45.98, 68.90 and 21.88 is: 32.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.98 : 68.90 = 21.88 : x
  2. Step 2: Convert to fraction form
    45.98/68.90 = 21.88/x
  3. Step 3: Cross multiply
    45.98x = 68.90 × 21.88
  4. Step 4: Simplify right side
    45.98x = 1,507.53
  5. Step 5: Solve for x
    x = 1,507.53/45.98
  6. Step 6: Final answer
    x = 32.79

Related Problems

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.