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Finding the Fourth Proportional to 14,286.84, 21,436.56 and 4,928.28

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Solution

The fourth proportional to 14,286.84, 21,436.56 and 4,928.28 is: 7,394.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,286.84 : 21,436.56 = 4,928.28 : x
  2. Step 2: Convert to fraction form
    14,286.84/21,436.56 = 4,928.28/x
  3. Step 3: Cross multiply
    14,286.84x = 21,436.56 × 4,928.28
  4. Step 4: Simplify right side
    14,286.84x = 105,645,369.92
  5. Step 5: Solve for x
    x = 105,645,369.92/14,286.84
  6. Step 6: Final answer
    x = 7,394.59

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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.