Home / 5,420.10-7,480.53-3,183.20

Finding the Fourth Proportional to 5,420.10, 7,480.53 and 3,183.20

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Solution

The fourth proportional to 5,420.10, 7,480.53 and 3,183.20 is: 4,393.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.10 : 7,480.53 = 3,183.20 : x
  2. Step 2: Convert to fraction form
    5,420.10/7,480.53 = 3,183.20/x
  3. Step 3: Cross multiply
    5,420.10x = 7,480.53 × 3,183.20
  4. Step 4: Simplify right side
    5,420.10x = 23,811,985.69
  5. Step 5: Solve for x
    x = 23,811,985.69/5,420.10
  6. Step 6: Final answer
    x = 4,393.27

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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.