Home / 5,172.70-7,137.96-2,814.79

Finding the Fourth Proportional to 5,172.70, 7,137.96 and 2,814.79

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Solution

The fourth proportional to 5,172.70, 7,137.96 and 2,814.79 is: 3,884.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.70 : 7,137.96 = 2,814.79 : x
  2. Step 2: Convert to fraction form
    5,172.70/7,137.96 = 2,814.79/x
  3. Step 3: Cross multiply
    5,172.70x = 7,137.96 × 2,814.79
  4. Step 4: Simplify right side
    5,172.70x = 20,091,858.43
  5. Step 5: Solve for x
    x = 20,091,858.43/5,172.70
  6. Step 6: Final answer
    x = 3,884.21

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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.