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Finding the Fourth Proportional to 7,076.88, 9,765.68 and 3,933.20

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Solution

The fourth proportional to 7,076.88, 9,765.68 and 3,933.20 is: 5,427.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,076.88 : 9,765.68 = 3,933.20 : x
  2. Step 2: Convert to fraction form
    7,076.88/9,765.68 = 3,933.20/x
  3. Step 3: Cross multiply
    7,076.88x = 9,765.68 × 3,933.20
  4. Step 4: Simplify right side
    7,076.88x = 38,410,372.58
  5. Step 5: Solve for x
    x = 38,410,372.58/7,076.88
  6. Step 6: Final answer
    x = 5,427.59

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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.