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Finding the Fourth Proportional to 8,438.70, 12,663.09 and 4,053.90

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Solution

The fourth proportional to 8,438.70, 12,663.09 and 4,053.90 is: 6,083.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,438.70 : 12,663.09 = 4,053.90 : x
  2. Step 2: Convert to fraction form
    8,438.70/12,663.09 = 4,053.90/x
  3. Step 3: Cross multiply
    8,438.70x = 12,663.09 × 4,053.90
  4. Step 4: Simplify right side
    8,438.70x = 51,334,900.55
  5. Step 5: Solve for x
    x = 51,334,900.55/8,438.70
  6. Step 6: Final answer
    x = 6,083.27

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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.