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Finding the Fourth Proportional to 8,659.92, 12,989.69 and 2,816.52

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Solution

The fourth proportional to 8,659.92, 12,989.69 and 2,816.52 is: 4,224.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,659.92 : 12,989.69 = 2,816.52 : x
  2. Step 2: Convert to fraction form
    8,659.92/12,989.69 = 2,816.52/x
  3. Step 3: Cross multiply
    8,659.92x = 12,989.69 × 2,816.52
  4. Step 4: Simplify right side
    8,659.92x = 36,585,707.60
  5. Step 5: Solve for x
    x = 36,585,707.60/8,659.92
  6. Step 6: Final answer
    x = 4,224.72

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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.