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Finding the Fourth Proportional to 8,765.72, 13,149.74 and 3,217.72

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Solution

The fourth proportional to 8,765.72, 13,149.74 and 3,217.72 is: 4,827.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,765.72 : 13,149.74 = 3,217.72 : x
  2. Step 2: Convert to fraction form
    8,765.72/13,149.74 = 3,217.72/x
  3. Step 3: Cross multiply
    8,765.72x = 13,149.74 × 3,217.72
  4. Step 4: Simplify right side
    8,765.72x = 42,312,181.39
  5. Step 5: Solve for x
    x = 42,312,181.39/8,765.72
  6. Step 6: Final answer
    x = 4,827.01

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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.