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Finding the Fourth Proportional to 25,961.29, 38,941.95 and 8,431.12

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Solution

The fourth proportional to 25,961.29, 38,941.95 and 8,431.12 is: 12,646.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,961.29 : 38,941.95 = 8,431.12 : x
  2. Step 2: Convert to fraction form
    25,961.29/38,941.95 = 8,431.12/x
  3. Step 3: Cross multiply
    25,961.29x = 38,941.95 × 8,431.12
  4. Step 4: Simplify right side
    25,961.29x = 328,324,286.35
  5. Step 5: Solve for x
    x = 328,324,286.35/25,961.29
  6. Step 6: Final answer
    x = 12,646.68

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Double scale
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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.