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Finding the Fourth Proportional to 12,958.29, 17,866.09 and 8,474.94

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Solution

The fourth proportional to 12,958.29, 17,866.09 and 8,474.94 is: 11,684.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,958.29 : 17,866.09 = 8,474.94 : x
  2. Step 2: Convert to fraction form
    12,958.29/17,866.09 = 8,474.94/x
  3. Step 3: Cross multiply
    12,958.29x = 17,866.09 × 8,474.94
  4. Step 4: Simplify right side
    12,958.29x = 151,413,909.08
  5. Step 5: Solve for x
    x = 151,413,909.08/12,958.29
  6. Step 6: Final answer
    x = 11,684.72

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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.