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Finding the Fourth Proportional to 8,351.71, 12,528.61 and 2,805.64

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Solution

The fourth proportional to 8,351.71, 12,528.61 and 2,805.64 is: 4,208.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,351.71 : 12,528.61 = 2,805.64 : x
  2. Step 2: Convert to fraction form
    8,351.71/12,528.61 = 2,805.64/x
  3. Step 3: Cross multiply
    8,351.71x = 12,528.61 × 2,805.64
  4. Step 4: Simplify right side
    8,351.71x = 35,150,731.02
  5. Step 5: Solve for x
    x = 35,150,731.02/8,351.71
  6. Step 6: Final answer
    x = 4,208.81

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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.