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Finding the Fourth Proportional to 18,407.21, 27,624.78 and 13,489.70

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Solution

The fourth proportional to 18,407.21, 27,624.78 and 13,489.70 is: 20,244.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,407.21 : 27,624.78 = 13,489.70 : x
  2. Step 2: Convert to fraction form
    18,407.21/27,624.78 = 13,489.70/x
  3. Step 3: Cross multiply
    18,407.21x = 27,624.78 × 13,489.70
  4. Step 4: Simplify right side
    18,407.21x = 372,649,856.64
  5. Step 5: Solve for x
    x = 372,649,856.64/18,407.21
  6. Step 6: Final answer
    x = 20,244.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.