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Finding the Fourth Proportional to 18,756.88, 25,872.30 and 12,031.86

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Solution

The fourth proportional to 18,756.88, 25,872.30 and 12,031.86 is: 16,596.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756.88 : 25,872.30 = 12,031.86 : x
  2. Step 2: Convert to fraction form
    18,756.88/25,872.30 = 12,031.86/x
  3. Step 3: Cross multiply
    18,756.88x = 25,872.30 × 12,031.86
  4. Step 4: Simplify right side
    18,756.88x = 311,291,891.48
  5. Step 5: Solve for x
    x = 311,291,891.48/18,756.88
  6. Step 6: Final answer
    x = 16,596.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.