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Finding the Fourth Proportional to 9,124.70, 13,687.05 and 3,281.90

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Solution

The fourth proportional to 9,124.70, 13,687.05 and 3,281.90 is: 4,922.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,124.70 : 13,687.05 = 3,281.90 : x
  2. Step 2: Convert to fraction form
    9,124.70/13,687.05 = 3,281.90/x
  3. Step 3: Cross multiply
    9,124.70x = 13,687.05 × 3,281.90
  4. Step 4: Simplify right side
    9,124.70x = 44,919,529.40
  5. Step 5: Solve for x
    x = 44,919,529.40/9,124.70
  6. Step 6: Final answer
    x = 4,922.85

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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.