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Finding the Fourth Proportional to 28,872.31, 39,871.31 and 27,299.89

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Solution

The fourth proportional to 28,872.31, 39,871.31 and 27,299.89 is: 37,699.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,872.31 : 39,871.31 = 27,299.89 : x
  2. Step 2: Convert to fraction form
    28,872.31/39,871.31 = 27,299.89/x
  3. Step 3: Cross multiply
    28,872.31x = 39,871.31 × 27,299.89
  4. Step 4: Simplify right side
    28,872.31x = 1,088,482,377.16
  5. Step 5: Solve for x
    x = 1,088,482,377.16/28,872.31
  6. Step 6: Final answer
    x = 37,699.87

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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.