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Finding the Fourth Proportional to 21,114.94, 29,137.40 and 11,682.94

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Solution

The fourth proportional to 21,114.94, 29,137.40 and 11,682.94 is: 16,121.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.94 : 29,137.40 = 11,682.94 : x
  2. Step 2: Convert to fraction form
    21,114.94/29,137.40 = 11,682.94/x
  3. Step 3: Cross multiply
    21,114.94x = 29,137.40 × 11,682.94
  4. Step 4: Simplify right side
    21,114.94x = 340,410,495.96
  5. Step 5: Solve for x
    x = 340,410,495.96/21,114.94
  6. Step 6: Final answer
    x = 16,121.78

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1.5x scale

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.