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Finding the Fourth Proportional to 13,168.80, 18,164.04 and 8,458.80

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Solution

The fourth proportional to 13,168.80, 18,164.04 and 8,458.80 is: 11,667.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,168.80 : 18,164.04 = 8,458.80 : x
  2. Step 2: Convert to fraction form
    13,168.80/18,164.04 = 8,458.80/x
  3. Step 3: Cross multiply
    13,168.80x = 18,164.04 × 8,458.80
  4. Step 4: Simplify right side
    13,168.80x = 153,645,981.55
  5. Step 5: Solve for x
    x = 153,645,981.55/13,168.80
  6. Step 6: Final answer
    x = 11,667.42

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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.