Home / 5,155.80-7,115.03-3,031.21

Finding the Fourth Proportional to 5,155.80, 7,115.03 and 3,031.21

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Solution

The fourth proportional to 5,155.80, 7,115.03 and 3,031.21 is: 4,183.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,155.80 : 7,115.03 = 3,031.21 : x
  2. Step 2: Convert to fraction form
    5,155.80/7,115.03 = 3,031.21/x
  3. Step 3: Cross multiply
    5,155.80x = 7,115.03 × 3,031.21
  4. Step 4: Simplify right side
    5,155.80x = 21,567,150.09
  5. Step 5: Solve for x
    x = 21,567,150.09/5,155.80
  6. Step 6: Final answer
    x = 4,183.09

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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.