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Finding the Fourth Proportional to 8,579.98, 12,847.42 and 6,905.20

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Solution

The fourth proportional to 8,579.98, 12,847.42 and 6,905.20 is: 10,339.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,579.98 : 12,847.42 = 6,905.20 : x
  2. Step 2: Convert to fraction form
    8,579.98/12,847.42 = 6,905.20/x
  3. Step 3: Cross multiply
    8,579.98x = 12,847.42 × 6,905.20
  4. Step 4: Simplify right side
    8,579.98x = 88,714,004.58
  5. Step 5: Solve for x
    x = 88,714,004.58/8,579.98
  6. Step 6: Final answer
    x = 10,339.65

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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.