Home / 30.70-45.98-25.64

Finding the Fourth Proportional to 30.70, 45.98 and 25.64

Calculator

Solution

The fourth proportional to 30.70, 45.98 and 25.64 is: 38.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.70 : 45.98 = 25.64 : x
  2. Step 2: Convert to fraction form
    30.70/45.98 = 25.64/x
  3. Step 3: Cross multiply
    30.70x = 45.98 × 25.64
  4. Step 4: Simplify right side
    30.70x = 1,178.93
  5. Step 5: Solve for x
    x = 1,178.93/30.70
  6. Step 6: Final answer
    x = 38.40

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.