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Finding the Fourth Proportional to 12,659.64, 18,989.46 and 3,894.36

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Solution

The fourth proportional to 12,659.64, 18,989.46 and 3,894.36 is: 5,841.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,659.64 : 18,989.46 = 3,894.36 : x
  2. Step 2: Convert to fraction form
    12,659.64/18,989.46 = 3,894.36/x
  3. Step 3: Cross multiply
    12,659.64x = 18,989.46 × 3,894.36
  4. Step 4: Simplify right side
    12,659.64x = 73,951,793.45
  5. Step 5: Solve for x
    x = 73,951,793.45/12,659.64
  6. Step 6: Final answer
    x = 5,841.54

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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.