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Finding the Fourth Proportional to 8,581.68, 12,874.32 and 3,316.68

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Solution

The fourth proportional to 8,581.68, 12,874.32 and 3,316.68 is: 4,975.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,581.68 : 12,874.32 = 3,316.68 : x
  2. Step 2: Convert to fraction form
    8,581.68/12,874.32 = 3,316.68/x
  3. Step 3: Cross multiply
    8,581.68x = 12,874.32 × 3,316.68
  4. Step 4: Simplify right side
    8,581.68x = 42,699,999.66
  5. Step 5: Solve for x
    x = 42,699,999.66/8,581.68
  6. Step 6: Final answer
    x = 4,975.72

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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.