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Finding the Fourth Proportional to 12,661, 18,989.52 and 4,339.09

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Solution

The fourth proportional to 12,661, 18,989.52 and 4,339.09 is: 6,507.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661 : 18,989.52 = 4,339.09 : x
  2. Step 2: Convert to fraction form
    12,661/18,989.52 = 4,339.09/x
  3. Step 3: Cross multiply
    12,661x = 18,989.52 × 4,339.09
  4. Step 4: Simplify right side
    12,661x = 82,397,236.34
  5. Step 5: Solve for x
    x = 82,397,236.34/12,661
  6. Step 6: Final answer
    x = 6,507.96

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1.5x scale

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.