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Finding the Fourth Proportional to 13,765.61, 18,993.25 and 8,100.61

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Solution

The fourth proportional to 13,765.61, 18,993.25 and 8,100.61 is: 11,176.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,765.61 : 18,993.25 = 8,100.61 : x
  2. Step 2: Convert to fraction form
    13,765.61/18,993.25 = 8,100.61/x
  3. Step 3: Cross multiply
    13,765.61x = 18,993.25 × 8,100.61
  4. Step 4: Simplify right side
    13,765.61x = 153,856,873.53
  5. Step 5: Solve for x
    x = 153,856,873.53/13,765.61
  6. Step 6: Final answer
    x = 11,176.90

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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.