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Finding the Fourth Proportional to 8,652.72, 12,976.14 and 2,807.88

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Solution

The fourth proportional to 8,652.72, 12,976.14 and 2,807.88 is: 4,210.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,652.72 : 12,976.14 = 2,807.88 : x
  2. Step 2: Convert to fraction form
    8,652.72/12,976.14 = 2,807.88/x
  3. Step 3: Cross multiply
    8,652.72x = 12,976.14 × 2,807.88
  4. Step 4: Simplify right side
    8,652.72x = 36,435,443.98
  5. Step 5: Solve for x
    x = 36,435,443.98/8,652.72
  6. Step 6: Final answer
    x = 4,210.87

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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.