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Finding the Fourth Proportional to 12,104.60, 18,108.30 and 10,479.20

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Solution

The fourth proportional to 12,104.60, 18,108.30 and 10,479.20 is: 15,676.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,104.60 : 18,108.30 = 10,479.20 : x
  2. Step 2: Convert to fraction form
    12,104.60/18,108.30 = 10,479.20/x
  3. Step 3: Cross multiply
    12,104.60x = 18,108.30 × 10,479.20
  4. Step 4: Simplify right side
    12,104.60x = 189,760,497.36
  5. Step 5: Solve for x
    x = 189,760,497.36/12,104.60
  6. Step 6: Final answer
    x = 15,676.73

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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.