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Finding the Fourth Proportional to 12,188.72, 16,811.88 and 7,474.88

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Solution

The fourth proportional to 12,188.72, 16,811.88 and 7,474.88 is: 10,310.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,188.72 : 16,811.88 = 7,474.88 : x
  2. Step 2: Convert to fraction form
    12,188.72/16,811.88 = 7,474.88/x
  3. Step 3: Cross multiply
    12,188.72x = 16,811.88 × 7,474.88
  4. Step 4: Simplify right side
    12,188.72x = 125,666,785.57
  5. Step 5: Solve for x
    x = 125,666,785.57/12,188.72
  6. Step 6: Final answer
    x = 10,310.09

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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.