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Finding the Fourth Proportional to 12,318.73, 18,491.91 and 4,928.34

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Solution

The fourth proportional to 12,318.73, 18,491.91 and 4,928.34 is: 7,398.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,318.73 : 18,491.91 = 4,928.34 : x
  2. Step 2: Convert to fraction form
    12,318.73/18,491.91 = 4,928.34/x
  3. Step 3: Cross multiply
    12,318.73x = 18,491.91 × 4,928.34
  4. Step 4: Simplify right side
    12,318.73x = 91,134,419.73
  5. Step 5: Solve for x
    x = 91,134,419.73/12,318.73
  6. Step 6: Final answer
    x = 7,398.04

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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.