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Finding the Fourth Proportional to 12,471.21, 17,212.41 and 11,910.69

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Solution

The fourth proportional to 12,471.21, 17,212.41 and 11,910.69 is: 16,438.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,471.21 : 17,212.41 = 11,910.69 : x
  2. Step 2: Convert to fraction form
    12,471.21/17,212.41 = 11,910.69/x
  3. Step 3: Cross multiply
    12,471.21x = 17,212.41 × 11,910.69
  4. Step 4: Simplify right side
    12,471.21x = 205,011,679.66
  5. Step 5: Solve for x
    x = 205,011,679.66/12,471.21
  6. Step 6: Final answer
    x = 16,438.80

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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.