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Finding the Fourth Proportional to 18,751, 28,126.76 and 4,900

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Solution

The fourth proportional to 18,751, 28,126.76 and 4,900 is: 7,350.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751 : 28,126.76 = 4,900 : x
  2. Step 2: Convert to fraction form
    18,751/28,126.76 = 4,900/x
  3. Step 3: Cross multiply
    18,751x = 28,126.76 × 4,900
  4. Step 4: Simplify right side
    18,751x = 137,821,124
  5. Step 5: Solve for x
    x = 137,821,124/18,751
  6. Step 6: Final answer
    x = 7,350.07

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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.