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Finding the Fourth Proportional to 8,586.62, 12,875.20 and 2,661.87

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Solution

The fourth proportional to 8,586.62, 12,875.20 and 2,661.87 is: 3,991.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,586.62 : 12,875.20 = 2,661.87 : x
  2. Step 2: Convert to fraction form
    8,586.62/12,875.20 = 2,661.87/x
  3. Step 3: Cross multiply
    8,586.62x = 12,875.20 × 2,661.87
  4. Step 4: Simplify right side
    8,586.62x = 34,272,108.62
  5. Step 5: Solve for x
    x = 34,272,108.62/8,586.62
  6. Step 6: Final answer
    x = 3,991.34

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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.