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Finding the Fourth Proportional to 29,640.26, 44,472.87 and 12,991.70

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Solution

The fourth proportional to 29,640.26, 44,472.87 and 12,991.70 is: 19,493.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,640.26 : 44,472.87 = 12,991.70 : x
  2. Step 2: Convert to fraction form
    29,640.26/44,472.87 = 12,991.70/x
  3. Step 3: Cross multiply
    29,640.26x = 44,472.87 × 12,991.70
  4. Step 4: Simplify right side
    29,640.26x = 577,778,185.18
  5. Step 5: Solve for x
    x = 577,778,185.18/29,640.26
  6. Step 6: Final answer
    x = 19,493.02

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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.