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Finding the Fourth Proportional to 8,660.60, 12,975.54 and 5,911.16

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Solution

The fourth proportional to 8,660.60, 12,975.54 and 5,911.16 is: 8,856.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.60 : 12,975.54 = 5,911.16 : x
  2. Step 2: Convert to fraction form
    8,660.60/12,975.54 = 5,911.16/x
  3. Step 3: Cross multiply
    8,660.60x = 12,975.54 × 5,911.16
  4. Step 4: Simplify right side
    8,660.60x = 76,700,493.03
  5. Step 5: Solve for x
    x = 76,700,493.03/8,660.60
  6. Step 6: Final answer
    x = 8,856.26

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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.