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Finding the Fourth Proportional to 18,289.92, 27,434.88 and 8,427.36

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Solution

The fourth proportional to 18,289.92, 27,434.88 and 8,427.36 is: 12,641.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,289.92 : 27,434.88 = 8,427.36 : x
  2. Step 2: Convert to fraction form
    18,289.92/27,434.88 = 8,427.36/x
  3. Step 3: Cross multiply
    18,289.92x = 27,434.88 × 8,427.36
  4. Step 4: Simplify right side
    18,289.92x = 231,203,610.32
  5. Step 5: Solve for x
    x = 231,203,610.32/18,289.92
  6. Step 6: Final answer
    x = 12,641.04

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Similar ratio
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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.