Home / 5,172.68-7,138.59-2,814.78

Finding the Fourth Proportional to 5,172.68, 7,138.59 and 2,814.78

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Solution

The fourth proportional to 5,172.68, 7,138.59 and 2,814.78 is: 3,884.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.68 : 7,138.59 = 2,814.78 : x
  2. Step 2: Convert to fraction form
    5,172.68/7,138.59 = 2,814.78/x
  3. Step 3: Cross multiply
    5,172.68x = 7,138.59 × 2,814.78
  4. Step 4: Simplify right side
    5,172.68x = 20,093,560.36
  5. Step 5: Solve for x
    x = 20,093,560.36/5,172.68
  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.