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Finding the Fourth Proportional to 29,195.88, 40,299.81 and 21,639.78

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Solution

The fourth proportional to 29,195.88, 40,299.81 and 21,639.78 is: 29,869.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,195.88 : 40,299.81 = 21,639.78 : x
  2. Step 2: Convert to fraction form
    29,195.88/40,299.81 = 21,639.78/x
  3. Step 3: Cross multiply
    29,195.88x = 40,299.81 × 21,639.78
  4. Step 4: Simplify right side
    29,195.88x = 872,079,022.44
  5. Step 5: Solve for x
    x = 872,079,022.44/29,195.88
  6. Step 6: Final answer
    x = 29,869.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.