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Finding the Fourth Proportional to 18,911, 28,379.46 and 6,599

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Solution

The fourth proportional to 18,911, 28,379.46 and 6,599 is: 9,903.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911 : 28,379.46 = 6,599 : x
  2. Step 2: Convert to fraction form
    18,911/28,379.46 = 6,599/x
  3. Step 3: Cross multiply
    18,911x = 28,379.46 × 6,599
  4. Step 4: Simplify right side
    18,911x = 187,276,056.54
  5. Step 5: Solve for x
    x = 187,276,056.54/18,911
  6. Step 6: Final answer
    x = 9,903.02

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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.