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Finding the Fourth Proportional to 5,105.88, 7,048.56 and 3,969

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Solution

The fourth proportional to 5,105.88, 7,048.56 and 3,969 is: 5,479.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105.88 : 7,048.56 = 3,969 : x
  2. Step 2: Convert to fraction form
    5,105.88/7,048.56 = 3,969/x
  3. Step 3: Cross multiply
    5,105.88x = 7,048.56 × 3,969
  4. Step 4: Simplify right side
    5,105.88x = 27,975,734.64
  5. Step 5: Solve for x
    x = 27,975,734.64/5,105.88
  6. Step 6: Final answer
    x = 5,479.12

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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.