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Finding the Fourth Proportional to 12,627.70, 18,905.10 and 11,169.70

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Solution

The fourth proportional to 12,627.70, 18,905.10 and 11,169.70 is: 16,722.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,627.70 : 18,905.10 = 11,169.70 : x
  2. Step 2: Convert to fraction form
    12,627.70/18,905.10 = 11,169.70/x
  3. Step 3: Cross multiply
    12,627.70x = 18,905.10 × 11,169.70
  4. Step 4: Simplify right side
    12,627.70x = 211,164,295.47
  5. Step 5: Solve for x
    x = 211,164,295.47/12,627.70
  6. Step 6: Final answer
    x = 16,722.31

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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.