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Finding the Fourth Proportional to 8,658.54, 12,989.43 and 2,816.82

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Solution

The fourth proportional to 8,658.54, 12,989.43 and 2,816.82 is: 4,225.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.54 : 12,989.43 = 2,816.82 : x
  2. Step 2: Convert to fraction form
    8,658.54/12,989.43 = 2,816.82/x
  3. Step 3: Cross multiply
    8,658.54x = 12,989.43 × 2,816.82
  4. Step 4: Simplify right side
    8,658.54x = 36,588,886.21
  5. Step 5: Solve for x
    x = 36,588,886.21/8,658.54
  6. Step 6: Final answer
    x = 4,225.76

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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.