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Finding the Fourth Proportional to 29,310.46, 40,448.42 and 15,881.80

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Solution

The fourth proportional to 29,310.46, 40,448.42 and 15,881.80 is: 21,916.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,310.46 : 40,448.42 = 15,881.80 : x
  2. Step 2: Convert to fraction form
    29,310.46/40,448.42 = 15,881.80/x
  3. Step 3: Cross multiply
    29,310.46x = 40,448.42 × 15,881.80
  4. Step 4: Simplify right side
    29,310.46x = 642,393,716.76
  5. Step 5: Solve for x
    x = 642,393,716.76/29,310.46
  6. Step 6: Final answer
    x = 21,916.88

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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.