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Finding the Fourth Proportional to 12,645.27, 17,450.17 and 6,979.80

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Solution

The fourth proportional to 12,645.27, 17,450.17 and 6,979.80 is: 9,631.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.27 : 17,450.17 = 6,979.80 : x
  2. Step 2: Convert to fraction form
    12,645.27/17,450.17 = 6,979.80/x
  3. Step 3: Cross multiply
    12,645.27x = 17,450.17 × 6,979.80
  4. Step 4: Simplify right side
    12,645.27x = 121,798,696.57
  5. Step 5: Solve for x
    x = 121,798,696.57/12,645.27
  6. Step 6: Final answer
    x = 9,631.96

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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.