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Finding the Fourth Proportional to 30,489.86, 45,747.87 and 11,783.03

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Solution

The fourth proportional to 30,489.86, 45,747.87 and 11,783.03 is: 17,679.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,489.86 : 45,747.87 = 11,783.03 : x
  2. Step 2: Convert to fraction form
    30,489.86/45,747.87 = 11,783.03/x
  3. Step 3: Cross multiply
    30,489.86x = 45,747.87 × 11,783.03
  4. Step 4: Simplify right side
    30,489.86x = 539,048,251.72
  5. Step 5: Solve for x
    x = 539,048,251.72/30,489.86
  6. Step 6: Final answer
    x = 17,679.59

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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.