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Finding the Fourth Proportional to 18,933, 28,403.16 and 8,544.75

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Solution

The fourth proportional to 18,933, 28,403.16 and 8,544.75 is: 12,818.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,933 : 28,403.16 = 8,544.75 : x
  2. Step 2: Convert to fraction form
    18,933/28,403.16 = 8,544.75/x
  3. Step 3: Cross multiply
    18,933x = 28,403.16 × 8,544.75
  4. Step 4: Simplify right side
    18,933x = 242,697,901.41
  5. Step 5: Solve for x
    x = 242,697,901.41/18,933
  6. Step 6: Final answer
    x = 12,818.78

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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.