Home / 20,419.22-30,628.85-5,629.30

Finding the Fourth Proportional to 20,419.22, 30,628.85 and 5,629.30

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Solution

The fourth proportional to 20,419.22, 30,628.85 and 5,629.30 is: 8,443.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.22 : 30,628.85 = 5,629.30 : x
  2. Step 2: Convert to fraction form
    20,419.22/30,628.85 = 5,629.30/x
  3. Step 3: Cross multiply
    20,419.22x = 30,628.85 × 5,629.30
  4. Step 4: Simplify right side
    20,419.22x = 172,418,880.59
  5. Step 5: Solve for x
    x = 172,418,880.59/20,419.22
  6. Step 6: Final answer
    x = 8,443.95

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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.