Home / 5,172.77-7,138.41-2,814.90

Finding the Fourth Proportional to 5,172.77, 7,138.41 and 2,814.90

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Solution

The fourth proportional to 5,172.77, 7,138.41 and 2,814.90 is: 3,884.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.77 : 7,138.41 = 2,814.90 : x
  2. Step 2: Convert to fraction form
    5,172.77/7,138.41 = 2,814.90/x
  3. Step 3: Cross multiply
    5,172.77x = 7,138.41 × 2,814.90
  4. Step 4: Simplify right side
    5,172.77x = 20,093,910.31
  5. Step 5: Solve for x
    x = 20,093,910.31/5,172.77
  6. Step 6: Final answer
    x = 3,884.56

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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.