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Finding the Fourth Proportional to 8,610.89, 12,913.29 and 2,765.52

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Solution

The fourth proportional to 8,610.89, 12,913.29 and 2,765.52 is: 4,147.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,610.89 : 12,913.29 = 2,765.52 : x
  2. Step 2: Convert to fraction form
    8,610.89/12,913.29 = 2,765.52/x
  3. Step 3: Cross multiply
    8,610.89x = 12,913.29 × 2,765.52
  4. Step 4: Simplify right side
    8,610.89x = 35,712,000.96
  5. Step 5: Solve for x
    x = 35,712,000.96/8,610.89
  6. Step 6: Final answer
    x = 4,147.31

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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.