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Finding the Fourth Proportional to 16,311.50, 22,511.79 and 9,687.50

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Solution

The fourth proportional to 16,311.50, 22,511.79 and 9,687.50 is: 13,369.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,311.50 : 22,511.79 = 9,687.50 : x
  2. Step 2: Convert to fraction form
    16,311.50/22,511.79 = 9,687.50/x
  3. Step 3: Cross multiply
    16,311.50x = 22,511.79 × 9,687.50
  4. Step 4: Simplify right side
    16,311.50x = 218,082,965.63
  5. Step 5: Solve for x
    x = 218,082,965.63/16,311.50
  6. Step 6: Final answer
    x = 13,369.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.