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Finding the Fourth Proportional to 18,928, 28,392.48 and 6,616

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Solution

The fourth proportional to 18,928, 28,392.48 and 6,616 is: 9,924.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928 : 28,392.48 = 6,616 : x
  2. Step 2: Convert to fraction form
    18,928/28,392.48 = 6,616/x
  3. Step 3: Cross multiply
    18,928x = 28,392.48 × 6,616
  4. Step 4: Simplify right side
    18,928x = 187,844,647.68
  5. Step 5: Solve for x
    x = 187,844,647.68/18,928
  6. Step 6: Final answer
    x = 9,924.17

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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.