Home / 5,519.21-7,616.48-3,129.63

Finding the Fourth Proportional to 5,519.21, 7,616.48 and 3,129.63

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Solution

The fourth proportional to 5,519.21, 7,616.48 and 3,129.63 is: 4,318.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,519.21 : 7,616.48 = 3,129.63 : x
  2. Step 2: Convert to fraction form
    5,519.21/7,616.48 = 3,129.63/x
  3. Step 3: Cross multiply
    5,519.21x = 7,616.48 × 3,129.63
  4. Step 4: Simplify right side
    5,519.21x = 23,836,764.30
  5. Step 5: Solve for x
    x = 23,836,764.30/5,519.21
  6. Step 6: Final answer
    x = 4,318.87

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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.