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Finding the Fourth Proportional to 8,707.60, 13,062.90 and 2,865.88

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Solution

The fourth proportional to 8,707.60, 13,062.90 and 2,865.88 is: 4,299.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,707.60 : 13,062.90 = 2,865.88 : x
  2. Step 2: Convert to fraction form
    8,707.60/13,062.90 = 2,865.88/x
  3. Step 3: Cross multiply
    8,707.60x = 13,062.90 × 2,865.88
  4. Step 4: Simplify right side
    8,707.60x = 37,436,703.85
  5. Step 5: Solve for x
    x = 37,436,703.85/8,707.60
  6. Step 6: Final answer
    x = 4,299.31

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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.