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Finding the Fourth Proportional to 25,668.76, 38,488.20 and 12,507.88

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Solution

The fourth proportional to 25,668.76, 38,488.20 and 12,507.88 is: 18,754.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,668.76 : 38,488.20 = 12,507.88 : x
  2. Step 2: Convert to fraction form
    25,668.76/38,488.20 = 12,507.88/x
  3. Step 3: Cross multiply
    25,668.76x = 38,488.20 × 12,507.88
  4. Step 4: Simplify right side
    25,668.76x = 481,405,787.02
  5. Step 5: Solve for x
    x = 481,405,787.02/25,668.76
  6. Step 6: Final answer
    x = 18,754.54

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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.