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Finding the Fourth Proportional to 8,665.41, 12,996.90 and 3,117.96

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Solution

The fourth proportional to 8,665.41, 12,996.90 and 3,117.96 is: 4,676.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.41 : 12,996.90 = 3,117.96 : x
  2. Step 2: Convert to fraction form
    8,665.41/12,996.90 = 3,117.96/x
  3. Step 3: Cross multiply
    8,665.41x = 12,996.90 × 3,117.96
  4. Step 4: Simplify right side
    8,665.41x = 40,523,814.32
  5. Step 5: Solve for x
    x = 40,523,814.32/8,665.41
  6. Step 6: Final answer
    x = 4,676.50

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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.