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Finding the Fourth Proportional to 8,647.40, 12,975.17 and 4,485.16

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Solution

The fourth proportional to 8,647.40, 12,975.17 and 4,485.16 is: 6,729.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,647.40 : 12,975.17 = 4,485.16 : x
  2. Step 2: Convert to fraction form
    8,647.40/12,975.17 = 4,485.16/x
  3. Step 3: Cross multiply
    8,647.40x = 12,975.17 × 4,485.16
  4. Step 4: Simplify right side
    8,647.40x = 58,195,713.48
  5. Step 5: Solve for x
    x = 58,195,713.48/8,647.40
  6. Step 6: Final answer
    x = 6,729.85

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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.