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Finding the Fourth Proportional to 18,809.62, 28,214.55 and 4,958.50

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Solution

The fourth proportional to 18,809.62, 28,214.55 and 4,958.50 is: 7,437.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809.62 : 28,214.55 = 4,958.50 : x
  2. Step 2: Convert to fraction form
    18,809.62/28,214.55 = 4,958.50/x
  3. Step 3: Cross multiply
    18,809.62x = 28,214.55 × 4,958.50
  4. Step 4: Simplify right side
    18,809.62x = 139,901,846.18
  5. Step 5: Solve for x
    x = 139,901,846.18/18,809.62
  6. Step 6: Final answer
    x = 7,437.78

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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.