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Finding the Fourth Proportional to 12,662.70, 18,994.05 and 11,301.90

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Solution

The fourth proportional to 12,662.70, 18,994.05 and 11,301.90 is: 16,952.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,662.70 : 18,994.05 = 11,301.90 : x
  2. Step 2: Convert to fraction form
    12,662.70/18,994.05 = 11,301.90/x
  3. Step 3: Cross multiply
    12,662.70x = 18,994.05 × 11,301.90
  4. Step 4: Simplify right side
    12,662.70x = 214,668,853.70
  5. Step 5: Solve for x
    x = 214,668,853.70/12,662.70
  6. Step 6: Final answer
    x = 16,952.85

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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.