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Finding the Fourth Proportional to 18,809.84, 28,214.81 and 4,769.88

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Solution

The fourth proportional to 18,809.84, 28,214.81 and 4,769.88 is: 7,154.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809.84 : 28,214.81 = 4,769.88 : x
  2. Step 2: Convert to fraction form
    18,809.84/28,214.81 = 4,769.88/x
  3. Step 3: Cross multiply
    18,809.84x = 28,214.81 × 4,769.88
  4. Step 4: Simplify right side
    18,809.84x = 134,581,257.92
  5. Step 5: Solve for x
    x = 134,581,257.92/18,809.84
  6. Step 6: Final answer
    x = 7,154.83

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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.