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Finding the Fourth Proportional to 8,630.74, 12,942.55 and 2,705.65

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Solution

The fourth proportional to 8,630.74, 12,942.55 and 2,705.65 is: 4,057.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,630.74 : 12,942.55 = 2,705.65 : x
  2. Step 2: Convert to fraction form
    8,630.74/12,942.55 = 2,705.65/x
  3. Step 3: Cross multiply
    8,630.74x = 12,942.55 × 2,705.65
  4. Step 4: Simplify right side
    8,630.74x = 35,017,932.17
  5. Step 5: Solve for x
    x = 35,017,932.17/8,630.74
  6. Step 6: Final answer
    x = 4,057.35

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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.