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Finding the Fourth Proportional to 18,611.80, 27,917.70 and 9,863.80

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Solution

The fourth proportional to 18,611.80, 27,917.70 and 9,863.80 is: 14,795.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,611.80 : 27,917.70 = 9,863.80 : x
  2. Step 2: Convert to fraction form
    18,611.80/27,917.70 = 9,863.80/x
  3. Step 3: Cross multiply
    18,611.80x = 27,917.70 × 9,863.80
  4. Step 4: Simplify right side
    18,611.80x = 275,374,609.26
  5. Step 5: Solve for x
    x = 275,374,609.26/18,611.80
  6. Step 6: Final answer
    x = 14,795.70

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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.