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Finding the Fourth Proportional to 18,788.50, 28,187.07 and 6,476.50

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Solution

The fourth proportional to 18,788.50, 28,187.07 and 6,476.50 is: 9,716.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,788.50 : 28,187.07 = 6,476.50 : x
  2. Step 2: Convert to fraction form
    18,788.50/28,187.07 = 6,476.50/x
  3. Step 3: Cross multiply
    18,788.50x = 28,187.07 × 6,476.50
  4. Step 4: Simplify right side
    18,788.50x = 182,553,558.86
  5. Step 5: Solve for x
    x = 182,553,558.86/18,788.50
  6. Step 6: Final answer
    x = 9,716.24

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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.