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Finding the Fourth Proportional to 11,806.60, 17,748.30 and 11,115.40

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Solution

The fourth proportional to 11,806.60, 17,748.30 and 11,115.40 is: 16,709.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,806.60 : 17,748.30 = 11,115.40 : x
  2. Step 2: Convert to fraction form
    11,806.60/17,748.30 = 11,115.40/x
  3. Step 3: Cross multiply
    11,806.60x = 17,748.30 × 11,115.40
  4. Step 4: Simplify right side
    11,806.60x = 197,279,453.82
  5. Step 5: Solve for x
    x = 197,279,453.82/11,806.60
  6. Step 6: Final answer
    x = 16,709.25

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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.