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Finding the Fourth Proportional to 25,951.88, 38,933.30 and 8,420.36

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Solution

The fourth proportional to 25,951.88, 38,933.30 and 8,420.36 is: 12,632.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,951.88 : 38,933.30 = 8,420.36 : x
  2. Step 2: Convert to fraction form
    25,951.88/38,933.30 = 8,420.36/x
  3. Step 3: Cross multiply
    25,951.88x = 38,933.30 × 8,420.36
  4. Step 4: Simplify right side
    25,951.88x = 327,832,228.37
  5. Step 5: Solve for x
    x = 327,832,228.37/25,951.88
  6. Step 6: Final answer
    x = 12,632.31

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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.