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Finding the Fourth Proportional to 48,491.87, 72,694.67 and 18,930.41

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Solution

The fourth proportional to 48,491.87, 72,694.67 and 18,930.41 is: 28,378.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,491.87 : 72,694.67 = 18,930.41 : x
  2. Step 2: Convert to fraction form
    48,491.87/72,694.67 = 18,930.41/x
  3. Step 3: Cross multiply
    48,491.87x = 72,694.67 × 18,930.41
  4. Step 4: Simplify right side
    48,491.87x = 1,376,139,722.39
  5. Step 5: Solve for x
    x = 1,376,139,722.39/48,491.87
  6. Step 6: Final answer
    x = 28,378.77

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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.