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Finding the Fourth Proportional to 12,321, 18,481.50 and 3,554.64

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Solution

The fourth proportional to 12,321, 18,481.50 and 3,554.64 is: 5,331.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,321 : 18,481.50 = 3,554.64 : x
  2. Step 2: Convert to fraction form
    12,321/18,481.50 = 3,554.64/x
  3. Step 3: Cross multiply
    12,321x = 18,481.50 × 3,554.64
  4. Step 4: Simplify right side
    12,321x = 65,695,079.16
  5. Step 5: Solve for x
    x = 65,695,079.16/12,321
  6. Step 6: Final answer
    x = 5,331.96

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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.