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Finding the Fourth Proportional to 8,429.76, 12,644.64 and 2,586.42

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Solution

The fourth proportional to 8,429.76, 12,644.64 and 2,586.42 is: 3,879.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,429.76 : 12,644.64 = 2,586.42 : x
  2. Step 2: Convert to fraction form
    8,429.76/12,644.64 = 2,586.42/x
  3. Step 3: Cross multiply
    8,429.76x = 12,644.64 × 2,586.42
  4. Step 4: Simplify right side
    8,429.76x = 32,704,349.79
  5. Step 5: Solve for x
    x = 32,704,349.79/8,429.76
  6. Step 6: Final answer
    x = 3,879.63

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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.