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Finding the Fourth Proportional to 12,896.55, 17,773.02 and 8,910.54

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Solution

The fourth proportional to 12,896.55, 17,773.02 and 8,910.54 is: 12,279.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,896.55 : 17,773.02 = 8,910.54 : x
  2. Step 2: Convert to fraction form
    12,896.55/17,773.02 = 8,910.54/x
  3. Step 3: Cross multiply
    12,896.55x = 17,773.02 × 8,910.54
  4. Step 4: Simplify right side
    12,896.55x = 158,367,205.63
  5. Step 5: Solve for x
    x = 158,367,205.63/12,896.55
  6. Step 6: Final answer
    x = 12,279.81

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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.