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Finding the Fourth Proportional to 8,668.52, 12,995.02 and 3,120.56

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Solution

The fourth proportional to 8,668.52, 12,995.02 and 3,120.56 is: 4,678.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,668.52 : 12,995.02 = 3,120.56 : x
  2. Step 2: Convert to fraction form
    8,668.52/12,995.02 = 3,120.56/x
  3. Step 3: Cross multiply
    8,668.52x = 12,995.02 × 3,120.56
  4. Step 4: Simplify right side
    8,668.52x = 40,551,739.61
  5. Step 5: Solve for x
    x = 40,551,739.61/8,668.52
  6. Step 6: Final answer
    x = 4,678.05

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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.