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Finding the Fourth Proportional to 29,791.50, 44,687.28 and 12,690

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Solution

The fourth proportional to 29,791.50, 44,687.28 and 12,690 is: 19,035.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,791.50 : 44,687.28 = 12,690 : x
  2. Step 2: Convert to fraction form
    29,791.50/44,687.28 = 12,690/x
  3. Step 3: Cross multiply
    29,791.50x = 44,687.28 × 12,690
  4. Step 4: Simplify right side
    29,791.50x = 567,081,583.20
  5. Step 5: Solve for x
    x = 567,081,583.20/29,791.50
  6. Step 6: Final answer
    x = 19,035.01

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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.