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Finding the Fourth Proportional to 13,409.76, 18,506.01 and 8,103.54

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Solution

The fourth proportional to 13,409.76, 18,506.01 and 8,103.54 is: 11,183.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,409.76 : 18,506.01 = 8,103.54 : x
  2. Step 2: Convert to fraction form
    13,409.76/18,506.01 = 8,103.54/x
  3. Step 3: Cross multiply
    13,409.76x = 18,506.01 × 8,103.54
  4. Step 4: Simplify right side
    13,409.76x = 149,964,192.28
  5. Step 5: Solve for x
    x = 149,964,192.28/13,409.76
  6. Step 6: Final answer
    x = 11,183.21

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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.