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Finding the Fourth Proportional to 18,785.02, 28,153.11 and 7,679.02

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Solution

The fourth proportional to 18,785.02, 28,153.11 and 7,679.02 is: 11,508.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785.02 : 28,153.11 = 7,679.02 : x
  2. Step 2: Convert to fraction form
    18,785.02/28,153.11 = 7,679.02/x
  3. Step 3: Cross multiply
    18,785.02x = 28,153.11 × 7,679.02
  4. Step 4: Simplify right side
    18,785.02x = 216,188,294.75
  5. Step 5: Solve for x
    x = 216,188,294.75/18,785.02
  6. Step 6: Final answer
    x = 11,508.55

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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.