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Finding the Fourth Proportional to 18,479.92, 27,719.88 and 6,788.08

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Solution

The fourth proportional to 18,479.92, 27,719.88 and 6,788.08 is: 10,182.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,479.92 : 27,719.88 = 6,788.08 : x
  2. Step 2: Convert to fraction form
    18,479.92/27,719.88 = 6,788.08/x
  3. Step 3: Cross multiply
    18,479.92x = 27,719.88 × 6,788.08
  4. Step 4: Simplify right side
    18,479.92x = 188,164,763.03
  5. Step 5: Solve for x
    x = 188,164,763.03/18,479.92
  6. Step 6: Final answer
    x = 10,182.12

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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.