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Finding the Fourth Proportional to 34,939.20, 52,408.20 and 8,643.96

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Solution

The fourth proportional to 34,939.20, 52,408.20 and 8,643.96 is: 12,965.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,939.20 : 52,408.20 = 8,643.96 : x
  2. Step 2: Convert to fraction form
    34,939.20/52,408.20 = 8,643.96/x
  3. Step 3: Cross multiply
    34,939.20x = 52,408.20 × 8,643.96
  4. Step 4: Simplify right side
    34,939.20x = 453,014,384.47
  5. Step 5: Solve for x
    x = 453,014,384.47/34,939.20
  6. Step 6: Final answer
    x = 12,965.79

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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.