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Finding the Fourth Proportional to 13,626, 20,530.05 and 12,311.28

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Solution

The fourth proportional to 13,626, 20,530.05 and 12,311.28 is: 18,549.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,626 : 20,530.05 = 12,311.28 : x
  2. Step 2: Convert to fraction form
    13,626/20,530.05 = 12,311.28/x
  3. Step 3: Cross multiply
    13,626x = 20,530.05 × 12,311.28
  4. Step 4: Simplify right side
    13,626x = 252,751,193.96
  5. Step 5: Solve for x
    x = 252,751,193.96/13,626
  6. Step 6: Final answer
    x = 18,549.18

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.