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Finding the Fourth Proportional to 25,907, 38,872.80 and 11,120.15

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Solution

The fourth proportional to 25,907, 38,872.80 and 11,120.15 is: 16,685.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,907 : 38,872.80 = 11,120.15 : x
  2. Step 2: Convert to fraction form
    25,907/38,872.80 = 11,120.15/x
  3. Step 3: Cross multiply
    25,907x = 38,872.80 × 11,120.15
  4. Step 4: Simplify right side
    25,907x = 432,271,366.92
  5. Step 5: Solve for x
    x = 432,271,366.92/25,907
  6. Step 6: Final answer
    x = 16,685.50

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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.