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Finding the Fourth Proportional to 8,351.98, 12,529.58 and 2,805.40

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Solution

The fourth proportional to 8,351.98, 12,529.58 and 2,805.40 is: 4,208.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,351.98 : 12,529.58 = 2,805.40 : x
  2. Step 2: Convert to fraction form
    8,351.98/12,529.58 = 2,805.40/x
  3. Step 3: Cross multiply
    8,351.98x = 12,529.58 × 2,805.40
  4. Step 4: Simplify right side
    8,351.98x = 35,150,483.73
  5. Step 5: Solve for x
    x = 35,150,483.73/8,351.98
  6. Step 6: Final answer
    x = 4,208.64

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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.