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Finding the Fourth Proportional to 8,760.22, 13,142.18 and 2,917.28

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Solution

The fourth proportional to 8,760.22, 13,142.18 and 2,917.28 is: 4,376.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,760.22 : 13,142.18 = 2,917.28 : x
  2. Step 2: Convert to fraction form
    8,760.22/13,142.18 = 2,917.28/x
  3. Step 3: Cross multiply
    8,760.22x = 13,142.18 × 2,917.28
  4. Step 4: Simplify right side
    8,760.22x = 38,339,459.02
  5. Step 5: Solve for x
    x = 38,339,459.02/8,760.22
  6. Step 6: Final answer
    x = 4,376.54

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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.