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Finding the Fourth Proportional to 12,679.66, 19,020.62 and 3,319.66

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Solution

The fourth proportional to 12,679.66, 19,020.62 and 3,319.66 is: 4,979.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.66 : 19,020.62 = 3,319.66 : x
  2. Step 2: Convert to fraction form
    12,679.66/19,020.62 = 3,319.66/x
  3. Step 3: Cross multiply
    12,679.66x = 19,020.62 × 3,319.66
  4. Step 4: Simplify right side
    12,679.66x = 63,141,991.39
  5. Step 5: Solve for x
    x = 63,141,991.39/12,679.66
  6. Step 6: Final answer
    x = 4,979.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.