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Finding the Fourth Proportional to 38,644.70, 53,326.62 and 21,647.61

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Solution

The fourth proportional to 38,644.70, 53,326.62 and 21,647.61 is: 29,871.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,644.70 : 53,326.62 = 21,647.61 : x
  2. Step 2: Convert to fraction form
    38,644.70/53,326.62 = 21,647.61/x
  3. Step 3: Cross multiply
    38,644.70x = 53,326.62 × 21,647.61
  4. Step 4: Simplify right side
    38,644.70x = 1,154,393,872.38
  5. Step 5: Solve for x
    x = 1,154,393,872.38/38,644.70
  6. Step 6: Final answer
    x = 29,871.99

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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.