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Finding the Fourth Proportional to 8,577.99, 12,871.31 and 3,387.51

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Solution

The fourth proportional to 8,577.99, 12,871.31 and 3,387.51 is: 5,082.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,577.99 : 12,871.31 = 3,387.51 : x
  2. Step 2: Convert to fraction form
    8,577.99/12,871.31 = 3,387.51/x
  3. Step 3: Cross multiply
    8,577.99x = 12,871.31 × 3,387.51
  4. Step 4: Simplify right side
    8,577.99x = 43,601,674.40
  5. Step 5: Solve for x
    x = 43,601,674.40/8,577.99
  6. Step 6: Final answer
    x = 5,082.97

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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.