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Finding the Fourth Proportional to 12,286.36, 16,953.69 and 6,979.69

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Solution

The fourth proportional to 12,286.36, 16,953.69 and 6,979.69 is: 9,631.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,286.36 : 16,953.69 = 6,979.69 : x
  2. Step 2: Convert to fraction form
    12,286.36/16,953.69 = 6,979.69/x
  3. Step 3: Cross multiply
    12,286.36x = 16,953.69 × 6,979.69
  4. Step 4: Simplify right side
    12,286.36x = 118,331,500.56
  5. Step 5: Solve for x
    x = 118,331,500.56/12,286.36
  6. Step 6: Final answer
    x = 9,631.13

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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.