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Finding the Fourth Proportional to 13,138.01, 18,133.49 and 8,662.55

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Solution

The fourth proportional to 13,138.01, 18,133.49 and 8,662.55 is: 11,956.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.01 : 18,133.49 = 8,662.55 : x
  2. Step 2: Convert to fraction form
    13,138.01/18,133.49 = 8,662.55/x
  3. Step 3: Cross multiply
    13,138.01x = 18,133.49 × 8,662.55
  4. Step 4: Simplify right side
    13,138.01x = 157,082,263.80
  5. Step 5: Solve for x
    x = 157,082,263.80/13,138.01
  6. Step 6: Final answer
    x = 11,956.32

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Half scale
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Double scale
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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.