Home / 5,172.69-7,138.22-2,814.78

Finding the Fourth Proportional to 5,172.69, 7,138.22 and 2,814.78

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Solution

The fourth proportional to 5,172.69, 7,138.22 and 2,814.78 is: 3,884.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.69 : 7,138.22 = 2,814.78 : x
  2. Step 2: Convert to fraction form
    5,172.69/7,138.22 = 2,814.78/x
  3. Step 3: Cross multiply
    5,172.69x = 7,138.22 × 2,814.78
  4. Step 4: Simplify right side
    5,172.69x = 20,092,504.82
  5. Step 5: Solve for x
    x = 20,092,504.82/5,172.69
  6. Step 6: Final answer
    x = 3,884.34

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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.