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Finding the Fourth Proportional to 30,640.88, 45,961.63 and 9,581.90

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Solution

The fourth proportional to 30,640.88, 45,961.63 and 9,581.90 is: 14,372.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,640.88 : 45,961.63 = 9,581.90 : x
  2. Step 2: Convert to fraction form
    30,640.88/45,961.63 = 9,581.90/x
  3. Step 3: Cross multiply
    30,640.88x = 45,961.63 × 9,581.90
  4. Step 4: Simplify right side
    30,640.88x = 440,399,488.73
  5. Step 5: Solve for x
    x = 440,399,488.73/30,640.88
  6. Step 6: Final answer
    x = 14,372.94

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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.