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Finding the Fourth Proportional to 12,159.26, 16,776.92 and 7,379.09

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Solution

The fourth proportional to 12,159.26, 16,776.92 and 7,379.09 is: 10,181.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,159.26 : 16,776.92 = 7,379.09 : x
  2. Step 2: Convert to fraction form
    12,159.26/16,776.92 = 7,379.09/x
  3. Step 3: Cross multiply
    12,159.26x = 16,776.92 × 7,379.09
  4. Step 4: Simplify right side
    12,159.26x = 123,798,391.92
  5. Step 5: Solve for x
    x = 123,798,391.92/12,159.26
  6. Step 6: Final answer
    x = 10,181.41

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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.