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Finding the Fourth Proportional to 8,676.72, 11,968.49 and 6,405.74

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Solution

The fourth proportional to 8,676.72, 11,968.49 and 6,405.74 is: 8,835.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,676.72 : 11,968.49 = 6,405.74 : x
  2. Step 2: Convert to fraction form
    8,676.72/11,968.49 = 6,405.74/x
  3. Step 3: Cross multiply
    8,676.72x = 11,968.49 × 6,405.74
  4. Step 4: Simplify right side
    8,676.72x = 76,667,035.13
  5. Step 5: Solve for x
    x = 76,667,035.13/8,676.72
  6. Step 6: Final answer
    x = 8,835.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.