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Finding the Fourth Proportional to 13,818.72, 20,733.72 and 7,249.20

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Solution

The fourth proportional to 13,818.72, 20,733.72 and 7,249.20 is: 10,876.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,818.72 : 20,733.72 = 7,249.20 : x
  2. Step 2: Convert to fraction form
    13,818.72/20,733.72 = 7,249.20/x
  3. Step 3: Cross multiply
    13,818.72x = 20,733.72 × 7,249.20
  4. Step 4: Simplify right side
    13,818.72x = 150,302,883.02
  5. Step 5: Solve for x
    x = 150,302,883.02/13,818.72
  6. Step 6: Final answer
    x = 10,876.76

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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.