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Finding the Fourth Proportional to 12,659.14, 18,993.57 and 8,914.51

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Solution

The fourth proportional to 12,659.14, 18,993.57 and 8,914.51 is: 13,375.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,659.14 : 18,993.57 = 8,914.51 : x
  2. Step 2: Convert to fraction form
    12,659.14/18,993.57 = 8,914.51/x
  3. Step 3: Cross multiply
    12,659.14x = 18,993.57 × 8,914.51
  4. Step 4: Simplify right side
    12,659.14x = 169,318,369.70
  5. Step 5: Solve for x
    x = 169,318,369.70/12,659.14
  6. Step 6: Final answer
    x = 13,375.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.