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Finding the Fourth Proportional to 8,455.01, 12,687.78 and 4,072.91

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Solution

The fourth proportional to 8,455.01, 12,687.78 and 4,072.91 is: 6,111.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,455.01 : 12,687.78 = 4,072.91 : x
  2. Step 2: Convert to fraction form
    8,455.01/12,687.78 = 4,072.91/x
  3. Step 3: Cross multiply
    8,455.01x = 12,687.78 × 4,072.91
  4. Step 4: Simplify right side
    8,455.01x = 51,676,186.04
  5. Step 5: Solve for x
    x = 51,676,186.04/8,455.01
  6. Step 6: Final answer
    x = 6,111.90

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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.