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Finding the Fourth Proportional to 18,679.64, 28,019.48 and 6,196.37

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Solution

The fourth proportional to 18,679.64, 28,019.48 and 6,196.37 is: 9,294.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679.64 : 28,019.48 = 6,196.37 : x
  2. Step 2: Convert to fraction form
    18,679.64/28,019.48 = 6,196.37/x
  3. Step 3: Cross multiply
    18,679.64x = 28,019.48 × 6,196.37
  4. Step 4: Simplify right side
    18,679.64x = 173,618,894.21
  5. Step 5: Solve for x
    x = 173,618,894.21/18,679.64
  6. Step 6: Final answer
    x = 9,294.55

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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.