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Finding the Fourth Proportional to 12,279.52, 16,945.73 and 6,690.52

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Solution

The fourth proportional to 12,279.52, 16,945.73 and 6,690.52 is: 9,232.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.52 : 16,945.73 = 6,690.52 : x
  2. Step 2: Convert to fraction form
    12,279.52/16,945.73 = 6,690.52/x
  3. Step 3: Cross multiply
    12,279.52x = 16,945.73 × 6,690.52
  4. Step 4: Simplify right side
    12,279.52x = 113,375,677.48
  5. Step 5: Solve for x
    x = 113,375,677.48/12,279.52
  6. Step 6: Final answer
    x = 9,232.91

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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.