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Finding the Fourth Proportional to 18,031.20, 26,998.20 and 14,143.20

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Solution

The fourth proportional to 18,031.20, 26,998.20 and 14,143.20 is: 21,176.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,031.20 : 26,998.20 = 14,143.20 : x
  2. Step 2: Convert to fraction form
    18,031.20/26,998.20 = 14,143.20/x
  3. Step 3: Cross multiply
    18,031.20x = 26,998.20 × 14,143.20
  4. Step 4: Simplify right side
    18,031.20x = 381,840,942.24
  5. Step 5: Solve for x
    x = 381,840,942.24/18,031.20
  6. Step 6: Final answer
    x = 21,176.68

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1.5x scale

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.