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Finding the Fourth Proportional to 13,632.60, 18,820.42 and 8,255.94

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Solution

The fourth proportional to 13,632.60, 18,820.42 and 8,255.94 is: 11,397.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,632.60 : 18,820.42 = 8,255.94 : x
  2. Step 2: Convert to fraction form
    13,632.60/18,820.42 = 8,255.94/x
  3. Step 3: Cross multiply
    13,632.60x = 18,820.42 × 8,255.94
  4. Step 4: Simplify right side
    13,632.60x = 155,380,258.29
  5. Step 5: Solve for x
    x = 155,380,258.29/13,632.60
  6. Step 6: Final answer
    x = 11,397.70

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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.