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Finding the Fourth Proportional to 30,318.96, 45,478.44 and 11,838

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Solution

The fourth proportional to 30,318.96, 45,478.44 and 11,838 is: 17,757

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,318.96 : 45,478.44 = 11,838 : x
  2. Step 2: Convert to fraction form
    30,318.96/45,478.44 = 11,838/x
  3. Step 3: Cross multiply
    30,318.96x = 45,478.44 × 11,838
  4. Step 4: Simplify right side
    30,318.96x = 538,373,772.72
  5. Step 5: Solve for x
    x = 538,373,772.72/30,318.96
  6. Step 6: Final answer
    x = 17,757

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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.