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Finding the Fourth Proportional to 8,652.20, 12,992.70 and 4,759.40

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Solution

The fourth proportional to 8,652.20, 12,992.70 and 4,759.40 is: 7,147.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,652.20 : 12,992.70 = 4,759.40 : x
  2. Step 2: Convert to fraction form
    8,652.20/12,992.70 = 4,759.40/x
  3. Step 3: Cross multiply
    8,652.20x = 12,992.70 × 4,759.40
  4. Step 4: Simplify right side
    8,652.20x = 61,837,456.38
  5. Step 5: Solve for x
    x = 61,837,456.38/8,652.20
  6. Step 6: Final answer
    x = 7,147.02

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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.