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Finding the Fourth Proportional to 8,321.73, 11,481.21 and 5,490.51

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Solution

The fourth proportional to 8,321.73, 11,481.21 and 5,490.51 is: 7,575.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,321.73 : 11,481.21 = 5,490.51 : x
  2. Step 2: Convert to fraction form
    8,321.73/11,481.21 = 5,490.51/x
  3. Step 3: Cross multiply
    8,321.73x = 11,481.21 × 5,490.51
  4. Step 4: Simplify right side
    8,321.73x = 63,037,698.32
  5. Step 5: Solve for x
    x = 63,037,698.32/8,321.73
  6. Step 6: Final answer
    x = 7,575.07

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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.