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Finding the Fourth Proportional to 12,279.09, 16,945.16 and 6,690.09

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Solution

The fourth proportional to 12,279.09, 16,945.16 and 6,690.09 is: 9,232.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.09 : 16,945.16 = 6,690.09 : x
  2. Step 2: Convert to fraction form
    12,279.09/16,945.16 = 6,690.09/x
  3. Step 3: Cross multiply
    12,279.09x = 16,945.16 × 6,690.09
  4. Step 4: Simplify right side
    12,279.09x = 113,364,675.56
  5. Step 5: Solve for x
    x = 113,364,675.56/12,279.09
  6. Step 6: Final answer
    x = 9,232.33

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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.