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Finding the Fourth Proportional to 18,306.25, 27,464.84 and 12,979.69

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Solution

The fourth proportional to 18,306.25, 27,464.84 and 12,979.69 is: 19,473.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,306.25 : 27,464.84 = 12,979.69 : x
  2. Step 2: Convert to fraction form
    18,306.25/27,464.84 = 12,979.69/x
  3. Step 3: Cross multiply
    18,306.25x = 27,464.84 × 12,979.69
  4. Step 4: Simplify right side
    18,306.25x = 356,484,975.54
  5. Step 5: Solve for x
    x = 356,484,975.54/18,306.25
  6. Step 6: Final answer
    x = 19,473.41

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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.