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Finding the Fourth Proportional to 18,630, 27,945 and 4,779

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Solution

The fourth proportional to 18,630, 27,945 and 4,779 is: 7,168.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,630 : 27,945 = 4,779 : x
  2. Step 2: Convert to fraction form
    18,630/27,945 = 4,779/x
  3. Step 3: Cross multiply
    18,630x = 27,945 × 4,779
  4. Step 4: Simplify right side
    18,630x = 133,549,155
  5. Step 5: Solve for x
    x = 133,549,155/18,630
  6. Step 6: Final answer
    x = 7,168.50

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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.