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Finding the Fourth Proportional to 12,676.70, 19,020.97 and 5,655.97

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Solution

The fourth proportional to 12,676.70, 19,020.97 and 5,655.97 is: 8,486.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,676.70 : 19,020.97 = 5,655.97 : x
  2. Step 2: Convert to fraction form
    12,676.70/19,020.97 = 5,655.97/x
  3. Step 3: Cross multiply
    12,676.70x = 19,020.97 × 5,655.97
  4. Step 4: Simplify right side
    12,676.70x = 107,582,035.69
  5. Step 5: Solve for x
    x = 107,582,035.69/12,676.70
  6. Step 6: Final answer
    x = 8,486.60

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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.