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Finding the Fourth Proportional to 11,281, 16,921.50 and 3,073

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Solution

The fourth proportional to 11,281, 16,921.50 and 3,073 is: 4,609.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,281 : 16,921.50 = 3,073 : x
  2. Step 2: Convert to fraction form
    11,281/16,921.50 = 3,073/x
  3. Step 3: Cross multiply
    11,281x = 16,921.50 × 3,073
  4. Step 4: Simplify right side
    11,281x = 51,999,769.50
  5. Step 5: Solve for x
    x = 51,999,769.50/11,281
  6. Step 6: Final answer
    x = 4,609.50

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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.