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Finding the Fourth Proportional to 18,926.44, 28,380.22 and 11,031.64

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Solution

The fourth proportional to 18,926.44, 28,380.22 and 11,031.64 is: 16,541.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,926.44 : 28,380.22 = 11,031.64 : x
  2. Step 2: Convert to fraction form
    18,926.44/28,380.22 = 11,031.64/x
  3. Step 3: Cross multiply
    18,926.44x = 28,380.22 × 11,031.64
  4. Step 4: Simplify right side
    18,926.44x = 313,080,370.16
  5. Step 5: Solve for x
    x = 313,080,370.16/18,926.44
  6. Step 6: Final answer
    x = 16,541.96

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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.