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Finding the Fourth Proportional to 25,361.30, 38,048.79 and 8,721.65

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Solution

The fourth proportional to 25,361.30, 38,048.79 and 8,721.65 is: 13,084.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,361.30 : 38,048.79 = 8,721.65 : x
  2. Step 2: Convert to fraction form
    25,361.30/38,048.79 = 8,721.65/x
  3. Step 3: Cross multiply
    25,361.30x = 38,048.79 × 8,721.65
  4. Step 4: Simplify right side
    25,361.30x = 331,848,201.06
  5. Step 5: Solve for x
    x = 331,848,201.06/25,361.30
  6. Step 6: Final answer
    x = 13,084.82

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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.