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Finding the Fourth Proportional to 12,279.70, 16,945.99 and 6,690.70

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Solution

The fourth proportional to 12,279.70, 16,945.99 and 6,690.70 is: 9,233.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.70 : 16,945.99 = 6,690.70 : x
  2. Step 2: Convert to fraction form
    12,279.70/16,945.99 = 6,690.70/x
  3. Step 3: Cross multiply
    12,279.70x = 16,945.99 × 6,690.70
  4. Step 4: Simplify right side
    12,279.70x = 113,380,596.61
  5. Step 5: Solve for x
    x = 113,380,596.61/12,279.70
  6. Step 6: Final answer
    x = 9,233.17

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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.