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Finding the Fourth Proportional to 7,687.80, 11,533.52 and 3,305.28

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Solution

The fourth proportional to 7,687.80, 11,533.52 and 3,305.28 is: 4,958.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,687.80 : 11,533.52 = 3,305.28 : x
  2. Step 2: Convert to fraction form
    7,687.80/11,533.52 = 3,305.28/x
  3. Step 3: Cross multiply
    7,687.80x = 11,533.52 × 3,305.28
  4. Step 4: Simplify right side
    7,687.80x = 38,121,512.99
  5. Step 5: Solve for x
    x = 38,121,512.99/7,687.80
  6. Step 6: Final answer
    x = 4,958.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.