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Finding the Fourth Proportional to 25,672.48, 35,405 and 21,379.79

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Solution

The fourth proportional to 25,672.48, 35,405 and 21,379.79 is: 29,484.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,672.48 : 35,405 = 21,379.79 : x
  2. Step 2: Convert to fraction form
    25,672.48/35,405 = 21,379.79/x
  3. Step 3: Cross multiply
    25,672.48x = 35,405 × 21,379.79
  4. Step 4: Simplify right side
    25,672.48x = 756,951,464.95
  5. Step 5: Solve for x
    x = 756,951,464.95/25,672.48
  6. Step 6: Final answer
    x = 29,484.94

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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.