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Finding the Fourth Proportional to 21,616.81, 32,439.80 and 8,467.54

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Solution

The fourth proportional to 21,616.81, 32,439.80 and 8,467.54 is: 12,707.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,616.81 : 32,439.80 = 8,467.54 : x
  2. Step 2: Convert to fraction form
    21,616.81/32,439.80 = 8,467.54/x
  3. Step 3: Cross multiply
    21,616.81x = 32,439.80 × 8,467.54
  4. Step 4: Simplify right side
    21,616.81x = 274,685,304.09
  5. Step 5: Solve for x
    x = 274,685,304.09/21,616.81
  6. Step 6: Final answer
    x = 12,707.02

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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.