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Finding the Fourth Proportional to 8,653, 12,981.12 and 2,808.04

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Solution

The fourth proportional to 8,653, 12,981.12 and 2,808.04 is: 4,212.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,653 : 12,981.12 = 2,808.04 : x
  2. Step 2: Convert to fraction form
    8,653/12,981.12 = 2,808.04/x
  3. Step 3: Cross multiply
    8,653x = 12,981.12 × 2,808.04
  4. Step 4: Simplify right side
    8,653x = 36,451,504.20
  5. Step 5: Solve for x
    x = 36,451,504.20/8,653
  6. Step 6: Final answer
    x = 4,212.59

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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.