Home / 12,279.68-16,945.76-6,690.72

Finding the Fourth Proportional to 12,279.68, 16,945.76 and 6,690.72

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Solution

The fourth proportional to 12,279.68, 16,945.76 and 6,690.72 is: 9,233.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.68 : 16,945.76 = 6,690.72 : x
  2. Step 2: Convert to fraction form
    12,279.68/16,945.76 = 6,690.72/x
  3. Step 3: Cross multiply
    12,279.68x = 16,945.76 × 6,690.72
  4. Step 4: Simplify right side
    12,279.68x = 113,379,335.35
  5. Step 5: Solve for x
    x = 113,379,335.35/12,279.68
  6. Step 6: Final answer
    x = 9,233.09

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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.