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Finding the Fourth Proportional to 25,818.12, 38,731.86 and 8,286.12

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Solution

The fourth proportional to 25,818.12, 38,731.86 and 8,286.12 is: 12,430.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,818.12 : 38,731.86 = 8,286.12 : x
  2. Step 2: Convert to fraction form
    25,818.12/38,731.86 = 8,286.12/x
  3. Step 3: Cross multiply
    25,818.12x = 38,731.86 × 8,286.12
  4. Step 4: Simplify right side
    25,818.12x = 320,936,839.78
  5. Step 5: Solve for x
    x = 320,936,839.78/25,818.12
  6. Step 6: Final answer
    x = 12,430.68

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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.