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Finding the Fourth Proportional to 18,823.39, 28,235.08 and 8,427.85

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Solution

The fourth proportional to 18,823.39, 28,235.08 and 8,427.85 is: 12,641.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,823.39 : 28,235.08 = 8,427.85 : x
  2. Step 2: Convert to fraction form
    18,823.39/28,235.08 = 8,427.85/x
  3. Step 3: Cross multiply
    18,823.39x = 28,235.08 × 8,427.85
  4. Step 4: Simplify right side
    18,823.39x = 237,960,958.93
  5. Step 5: Solve for x
    x = 237,960,958.93/18,823.39
  6. Step 6: Final answer
    x = 12,641.77

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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.