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Finding the Fourth Proportional to 18,775, 28,162.50 and 4,924

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Solution

The fourth proportional to 18,775, 28,162.50 and 4,924 is: 7,386

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,775 : 28,162.50 = 4,924 : x
  2. Step 2: Convert to fraction form
    18,775/28,162.50 = 4,924/x
  3. Step 3: Cross multiply
    18,775x = 28,162.50 × 4,924
  4. Step 4: Simplify right side
    18,775x = 138,672,150
  5. Step 5: Solve for x
    x = 138,672,150/18,775
  6. Step 6: Final answer
    x = 7,386

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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.