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Finding the Fourth Proportional to 18,441.68, 27,662.45 and 7,910.80

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Solution

The fourth proportional to 18,441.68, 27,662.45 and 7,910.80 is: 11,866.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,441.68 : 27,662.45 = 7,910.80 : x
  2. Step 2: Convert to fraction form
    18,441.68/27,662.45 = 7,910.80/x
  3. Step 3: Cross multiply
    18,441.68x = 27,662.45 × 7,910.80
  4. Step 4: Simplify right side
    18,441.68x = 218,832,000.75
  5. Step 5: Solve for x
    x = 218,832,000.75/18,441.68
  6. Step 6: Final answer
    x = 11,866.17

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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.