Home / 5,171.85-7,137.55-3,155.09

Finding the Fourth Proportional to 5,171.85, 7,137.55 and 3,155.09

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Solution

The fourth proportional to 5,171.85, 7,137.55 and 3,155.09 is: 4,354.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,171.85 : 7,137.55 = 3,155.09 : x
  2. Step 2: Convert to fraction form
    5,171.85/7,137.55 = 3,155.09/x
  3. Step 3: Cross multiply
    5,171.85x = 7,137.55 × 3,155.09
  4. Step 4: Simplify right side
    5,171.85x = 22,519,607.65
  5. Step 5: Solve for x
    x = 22,519,607.65/5,171.85
  6. Step 6: Final answer
    x = 4,354.26

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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.