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Finding the Fourth Proportional to 8,648.94, 12,973.86 and 2,805.09

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Solution

The fourth proportional to 8,648.94, 12,973.86 and 2,805.09 is: 4,207.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,648.94 : 12,973.86 = 2,805.09 : x
  2. Step 2: Convert to fraction form
    8,648.94/12,973.86 = 2,805.09/x
  3. Step 3: Cross multiply
    8,648.94x = 12,973.86 × 2,805.09
  4. Step 4: Simplify right side
    8,648.94x = 36,392,844.95
  5. Step 5: Solve for x
    x = 36,392,844.95/8,648.94
  6. Step 6: Final answer
    x = 4,207.78

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1.5x scale

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.