Home / 5,139.37-7,090.77-3,149.20

Finding the Fourth Proportional to 5,139.37, 7,090.77 and 3,149.20

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Solution

The fourth proportional to 5,139.37, 7,090.77 and 3,149.20 is: 4,344.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.37 : 7,090.77 = 3,149.20 : x
  2. Step 2: Convert to fraction form
    5,139.37/7,090.77 = 3,149.20/x
  3. Step 3: Cross multiply
    5,139.37x = 7,090.77 × 3,149.20
  4. Step 4: Simplify right side
    5,139.37x = 22,330,252.88
  5. Step 5: Solve for x
    x = 22,330,252.88/5,139.37
  6. Step 6: Final answer
    x = 4,344.94

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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.