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Finding the Fourth Proportional to 13,766.03, 18,996.48 and 7,716.79

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Solution

The fourth proportional to 13,766.03, 18,996.48 and 7,716.79 is: 10,648.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,766.03 : 18,996.48 = 7,716.79 : x
  2. Step 2: Convert to fraction form
    13,766.03/18,996.48 = 7,716.79/x
  3. Step 3: Cross multiply
    13,766.03x = 18,996.48 × 7,716.79
  4. Step 4: Simplify right side
    13,766.03x = 146,591,846.90
  5. Step 5: Solve for x
    x = 146,591,846.90/13,766.03
  6. Step 6: Final answer
    x = 10,648.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.