Home / 57,880.40-86,820.60-20,939.60

Finding the Fourth Proportional to 57,880.40, 86,820.60 and 20,939.60

Calculator

Solution

The fourth proportional to 57,880.40, 86,820.60 and 20,939.60 is: 31,409.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,880.40 : 86,820.60 = 20,939.60 : x
  2. Step 2: Convert to fraction form
    57,880.40/86,820.60 = 20,939.60/x
  3. Step 3: Cross multiply
    57,880.40x = 86,820.60 × 20,939.60
  4. Step 4: Simplify right side
    57,880.40x = 1,817,988,635.76
  5. Step 5: Solve for x
    x = 1,817,988,635.76/57,880.40
  6. Step 6: Final answer
    x = 31,409.40

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.