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Finding the Fourth Proportional to 25,951.31, 38,929.70 and 11,908.95

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Solution

The fourth proportional to 25,951.31, 38,929.70 and 11,908.95 is: 17,864.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,951.31 : 38,929.70 = 11,908.95 : x
  2. Step 2: Convert to fraction form
    25,951.31/38,929.70 = 11,908.95/x
  3. Step 3: Cross multiply
    25,951.31x = 38,929.70 × 11,908.95
  4. Step 4: Simplify right side
    25,951.31x = 463,611,880.59
  5. Step 5: Solve for x
    x = 463,611,880.59/25,951.31
  6. Step 6: Final answer
    x = 17,864.68

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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.