Home / 5,178.36-7,147.20-3,190.56

Finding the Fourth Proportional to 5,178.36, 7,147.20 and 3,190.56

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Solution

The fourth proportional to 5,178.36, 7,147.20 and 3,190.56 is: 4,403.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.36 : 7,147.20 = 3,190.56 : x
  2. Step 2: Convert to fraction form
    5,178.36/7,147.20 = 3,190.56/x
  3. Step 3: Cross multiply
    5,178.36x = 7,147.20 × 3,190.56
  4. Step 4: Simplify right side
    5,178.36x = 22,803,570.43
  5. Step 5: Solve for x
    x = 22,803,570.43/5,178.36
  6. Step 6: Final answer
    x = 4,403.63

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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.