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Finding the Fourth Proportional to 18,783, 28,174.50 and 4,932

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Solution

The fourth proportional to 18,783, 28,174.50 and 4,932 is: 7,398

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783 : 28,174.50 = 4,932 : x
  2. Step 2: Convert to fraction form
    18,783/28,174.50 = 4,932/x
  3. Step 3: Cross multiply
    18,783x = 28,174.50 × 4,932
  4. Step 4: Simplify right side
    18,783x = 138,956,634
  5. Step 5: Solve for x
    x = 138,956,634/18,783
  6. Step 6: Final answer
    x = 7,398

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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.