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Finding the Fourth Proportional to 21,710.64, 29,960.24 and 12,149.94

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Solution

The fourth proportional to 21,710.64, 29,960.24 and 12,149.94 is: 16,766.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,710.64 : 29,960.24 = 12,149.94 : x
  2. Step 2: Convert to fraction form
    21,710.64/29,960.24 = 12,149.94/x
  3. Step 3: Cross multiply
    21,710.64x = 29,960.24 × 12,149.94
  4. Step 4: Simplify right side
    21,710.64x = 364,015,057.64
  5. Step 5: Solve for x
    x = 364,015,057.64/21,710.64
  6. Step 6: Final answer
    x = 16,766.67

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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.