Home / 5,198.78-7,172.15-3,180.67

Finding the Fourth Proportional to 5,198.78, 7,172.15 and 3,180.67

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Solution

The fourth proportional to 5,198.78, 7,172.15 and 3,180.67 is: 4,387.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,198.78 : 7,172.15 = 3,180.67 : x
  2. Step 2: Convert to fraction form
    5,198.78/7,172.15 = 3,180.67/x
  3. Step 3: Cross multiply
    5,198.78x = 7,172.15 × 3,180.67
  4. Step 4: Simplify right side
    5,198.78x = 22,812,208.51
  5. Step 5: Solve for x
    x = 22,812,208.51/5,198.78
  6. Step 6: Final answer
    x = 4,387.99

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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.