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Finding the Fourth Proportional to 13,616.91, 18,786.65 and 8,508.96

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Solution

The fourth proportional to 13,616.91, 18,786.65 and 8,508.96 is: 11,739.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,616.91 : 18,786.65 = 8,508.96 : x
  2. Step 2: Convert to fraction form
    13,616.91/18,786.65 = 8,508.96/x
  3. Step 3: Cross multiply
    13,616.91x = 18,786.65 × 8,508.96
  4. Step 4: Simplify right side
    13,616.91x = 159,854,810.84
  5. Step 5: Solve for x
    x = 159,854,810.84/13,616.91
  6. Step 6: Final answer
    x = 11,739.43

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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.