Home / 20,138.47-30,205.39-5,348.55

Finding the Fourth Proportional to 20,138.47, 30,205.39 and 5,348.55

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Solution

The fourth proportional to 20,138.47, 30,205.39 and 5,348.55 is: 8,022.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.47 : 30,205.39 = 5,348.55 : x
  2. Step 2: Convert to fraction form
    20,138.47/30,205.39 = 5,348.55/x
  3. Step 3: Cross multiply
    20,138.47x = 30,205.39 × 5,348.55
  4. Step 4: Simplify right side
    20,138.47x = 161,555,038.68
  5. Step 5: Solve for x
    x = 161,555,038.68/20,138.47
  6. Step 6: Final answer
    x = 8,022.21

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1.5x scale

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.