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Finding the Fourth Proportional to 13,662.09, 18,866.03 and 8,635.23

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Solution

The fourth proportional to 13,662.09, 18,866.03 and 8,635.23 is: 11,924.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,662.09 : 18,866.03 = 8,635.23 : x
  2. Step 2: Convert to fraction form
    13,662.09/18,866.03 = 8,635.23/x
  3. Step 3: Cross multiply
    13,662.09x = 18,866.03 × 8,635.23
  4. Step 4: Simplify right side
    13,662.09x = 162,912,465.06
  5. Step 5: Solve for x
    x = 162,912,465.06/13,662.09
  6. Step 6: Final answer
    x = 11,924.42

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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.