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Finding the Fourth Proportional to 8,507.12, 12,757.64 and 2,959.12

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Solution

The fourth proportional to 8,507.12, 12,757.64 and 2,959.12 is: 4,437.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,507.12 : 12,757.64 = 2,959.12 : x
  2. Step 2: Convert to fraction form
    8,507.12/12,757.64 = 2,959.12/x
  3. Step 3: Cross multiply
    8,507.12x = 12,757.64 × 2,959.12
  4. Step 4: Simplify right side
    8,507.12x = 37,751,387.68
  5. Step 5: Solve for x
    x = 37,751,387.68/8,507.12
  6. Step 6: Final answer
    x = 4,437.62

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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.