Home / 5,173.11-7,138.71-2,815.20

Finding the Fourth Proportional to 5,173.11, 7,138.71 and 2,815.20

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Solution

The fourth proportional to 5,173.11, 7,138.71 and 2,815.20 is: 3,884.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,173.11 : 7,138.71 = 2,815.20 : x
  2. Step 2: Convert to fraction form
    5,173.11/7,138.71 = 2,815.20/x
  3. Step 3: Cross multiply
    5,173.11x = 7,138.71 × 2,815.20
  4. Step 4: Simplify right side
    5,173.11x = 20,096,896.39
  5. Step 5: Solve for x
    x = 20,096,896.39/5,173.11
  6. Step 6: Final answer
    x = 3,884.88

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1.5x scale

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.