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Finding the Fourth Proportional to 7,065.78, 9,750.89 and 3,879.37

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Solution

The fourth proportional to 7,065.78, 9,750.89 and 3,879.37 is: 5,353.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,065.78 : 9,750.89 = 3,879.37 : x
  2. Step 2: Convert to fraction form
    7,065.78/9,750.89 = 3,879.37/x
  3. Step 3: Cross multiply
    7,065.78x = 9,750.89 × 3,879.37
  4. Step 4: Simplify right side
    7,065.78x = 37,827,310.14
  5. Step 5: Solve for x
    x = 37,827,310.14/7,065.78
  6. Step 6: Final answer
    x = 5,353.59

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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.