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Finding the Fourth Proportional to 18,384.63, 27,576.94 and 10,991.20

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Solution

The fourth proportional to 18,384.63, 27,576.94 and 10,991.20 is: 16,486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,384.63 : 27,576.94 = 10,991.20 : x
  2. Step 2: Convert to fraction form
    18,384.63/27,576.94 = 10,991.20/x
  3. Step 3: Cross multiply
    18,384.63x = 27,576.94 × 10,991.20
  4. Step 4: Simplify right side
    18,384.63x = 303,103,662.93
  5. Step 5: Solve for x
    x = 303,103,662.93/18,384.63
  6. Step 6: Final answer
    x = 16,486.80

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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.