Home / 47.84-71.77-20.77

Finding the Fourth Proportional to 47.84, 71.77 and 20.77

Calculator

Solution

The fourth proportional to 47.84, 71.77 and 20.77 is: 31.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.84 : 71.77 = 20.77 : x
  2. Step 2: Convert to fraction form
    47.84/71.77 = 20.77/x
  3. Step 3: Cross multiply
    47.84x = 71.77 × 20.77
  4. Step 4: Simplify right side
    47.84x = 1,490.87
  5. Step 5: Solve for x
    x = 1,490.87/47.84
  6. Step 6: Final answer
    x = 31.16

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.