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Finding the Fourth Proportional to 5,115.75, 7,059.74 and 2,907.75

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Solution

The fourth proportional to 5,115.75, 7,059.74 and 2,907.75 is: 4,012.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.75 : 7,059.74 = 2,907.75 : x
  2. Step 2: Convert to fraction form
    5,115.75/7,059.74 = 2,907.75/x
  3. Step 3: Cross multiply
    5,115.75x = 7,059.74 × 2,907.75
  4. Step 4: Simplify right side
    5,115.75x = 20,527,944.45
  5. Step 5: Solve for x
    x = 20,527,944.45/5,115.75
  6. Step 6: Final answer
    x = 4,012.70

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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.