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Finding the Fourth Proportional to 8,504.64, 12,739.68 and 4,392

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Solution

The fourth proportional to 8,504.64, 12,739.68 and 4,392 is: 6,579.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,504.64 : 12,739.68 = 4,392 : x
  2. Step 2: Convert to fraction form
    8,504.64/12,739.68 = 4,392/x
  3. Step 3: Cross multiply
    8,504.64x = 12,739.68 × 4,392
  4. Step 4: Simplify right side
    8,504.64x = 55,952,674.56
  5. Step 5: Solve for x
    x = 55,952,674.56/8,504.64
  6. Step 6: Final answer
    x = 6,579.08

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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.