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Finding the Fourth Proportional to 12,171, 16,796.57 and 6,865.70

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Solution

The fourth proportional to 12,171, 16,796.57 and 6,865.70 is: 9,474.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,171 : 16,796.57 = 6,865.70 : x
  2. Step 2: Convert to fraction form
    12,171/16,796.57 = 6,865.70/x
  3. Step 3: Cross multiply
    12,171x = 16,796.57 × 6,865.70
  4. Step 4: Simplify right side
    12,171x = 115,320,092.34
  5. Step 5: Solve for x
    x = 115,320,092.34/12,171
  6. Step 6: Final answer
    x = 9,474.99

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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.