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Finding the Fourth Proportional to 11,019, 16,528.50 and 2,811

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Solution

The fourth proportional to 11,019, 16,528.50 and 2,811 is: 4,216.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,019 : 16,528.50 = 2,811 : x
  2. Step 2: Convert to fraction form
    11,019/16,528.50 = 2,811/x
  3. Step 3: Cross multiply
    11,019x = 16,528.50 × 2,811
  4. Step 4: Simplify right side
    11,019x = 46,461,613.50
  5. Step 5: Solve for x
    x = 46,461,613.50/11,019
  6. Step 6: Final answer
    x = 4,216.50

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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.