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Finding the Fourth Proportional to 12,696.24, 17,520.78 and 7,107.24

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Solution

The fourth proportional to 12,696.24, 17,520.78 and 7,107.24 is: 9,807.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,696.24 : 17,520.78 = 7,107.24 : x
  2. Step 2: Convert to fraction form
    12,696.24/17,520.78 = 7,107.24/x
  3. Step 3: Cross multiply
    12,696.24x = 17,520.78 × 7,107.24
  4. Step 4: Simplify right side
    12,696.24x = 124,524,388.45
  5. Step 5: Solve for x
    x = 124,524,388.45/12,696.24
  6. Step 6: Final answer
    x = 9,807.97

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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.