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Finding the Fourth Proportional to 8,765.31, 13,143.11 and 2,918.73

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Solution

The fourth proportional to 8,765.31, 13,143.11 and 2,918.73 is: 4,376.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,765.31 : 13,143.11 = 2,918.73 : x
  2. Step 2: Convert to fraction form
    8,765.31/13,143.11 = 2,918.73/x
  3. Step 3: Cross multiply
    8,765.31x = 13,143.11 × 2,918.73
  4. Step 4: Simplify right side
    8,765.31x = 38,361,174.86
  5. Step 5: Solve for x
    x = 38,361,174.86/8,765.31
  6. Step 6: Final answer
    x = 4,376.48

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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.