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Finding the Fourth Proportional to 18,662.76, 27,994.68 and 4,811.76

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Solution

The fourth proportional to 18,662.76, 27,994.68 and 4,811.76 is: 7,217.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,662.76 : 27,994.68 = 4,811.76 : x
  2. Step 2: Convert to fraction form
    18,662.76/27,994.68 = 4,811.76/x
  3. Step 3: Cross multiply
    18,662.76x = 27,994.68 × 4,811.76
  4. Step 4: Simplify right side
    18,662.76x = 134,703,681.44
  5. Step 5: Solve for x
    x = 134,703,681.44/18,662.76
  6. Step 6: Final answer
    x = 7,217.78

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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.