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Finding the Fourth Proportional to 63,391.56, 95,021.32 and 21,239.88

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Solution

The fourth proportional to 63,391.56, 95,021.32 and 21,239.88 is: 31,837.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,391.56 : 95,021.32 = 21,239.88 : x
  2. Step 2: Convert to fraction form
    63,391.56/95,021.32 = 21,239.88/x
  3. Step 3: Cross multiply
    63,391.56x = 95,021.32 × 21,239.88
  4. Step 4: Simplify right side
    63,391.56x = 2,018,241,434.24
  5. Step 5: Solve for x
    x = 2,018,241,434.24/63,391.56
  6. Step 6: Final answer
    x = 31,837.70

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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.