Home / 15,761.82-21,751.38-8,688.09

Finding the Fourth Proportional to 15,761.82, 21,751.38 and 8,688.09

Calculator

Solution

The fourth proportional to 15,761.82, 21,751.38 and 8,688.09 is: 11,989.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,761.82 : 21,751.38 = 8,688.09 : x
  2. Step 2: Convert to fraction form
    15,761.82/21,751.38 = 8,688.09/x
  3. Step 3: Cross multiply
    15,761.82x = 21,751.38 × 8,688.09
  4. Step 4: Simplify right side
    15,761.82x = 188,977,947.06
  5. Step 5: Solve for x
    x = 188,977,947.06/15,761.82
  6. Step 6: Final answer
    x = 11,989.60

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.