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Finding the Fourth Proportional to 8,664.52, 12,989.02 and 3,116.56

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Solution

The fourth proportional to 8,664.52, 12,989.02 and 3,116.56 is: 4,672.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.52 : 12,989.02 = 3,116.56 : x
  2. Step 2: Convert to fraction form
    8,664.52/12,989.02 = 3,116.56/x
  3. Step 3: Cross multiply
    8,664.52x = 12,989.02 × 3,116.56
  4. Step 4: Simplify right side
    8,664.52x = 40,481,060.17
  5. Step 5: Solve for x
    x = 40,481,060.17/8,664.52
  6. Step 6: Final answer
    x = 4,672.05

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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.