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Finding the Fourth Proportional to 13,491.92, 18,626.76 and 8,530.64

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Solution

The fourth proportional to 13,491.92, 18,626.76 and 8,530.64 is: 11,777.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,491.92 : 18,626.76 = 8,530.64 : x
  2. Step 2: Convert to fraction form
    13,491.92/18,626.76 = 8,530.64/x
  3. Step 3: Cross multiply
    13,491.92x = 18,626.76 × 8,530.64
  4. Step 4: Simplify right side
    13,491.92x = 158,898,183.93
  5. Step 5: Solve for x
    x = 158,898,183.93/13,491.92
  6. Step 6: Final answer
    x = 11,777.28

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1.5x scale

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.