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Finding the Fourth Proportional to 18,769.98, 28,154.38 and 4,729.98

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Solution

The fourth proportional to 18,769.98, 28,154.38 and 4,729.98 is: 7,094.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,769.98 : 28,154.38 = 4,729.98 : x
  2. Step 2: Convert to fraction form
    18,769.98/28,154.38 = 4,729.98/x
  3. Step 3: Cross multiply
    18,769.98x = 28,154.38 × 4,729.98
  4. Step 4: Simplify right side
    18,769.98x = 133,169,654.31
  5. Step 5: Solve for x
    x = 133,169,654.31/18,769.98
  6. Step 6: Final answer
    x = 7,094.82

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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.