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Finding the Fourth Proportional to 8,614.72, 12,918.64 and 3,686.56

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Solution

The fourth proportional to 8,614.72, 12,918.64 and 3,686.56 is: 5,528.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,614.72 : 12,918.64 = 3,686.56 : x
  2. Step 2: Convert to fraction form
    8,614.72/12,918.64 = 3,686.56/x
  3. Step 3: Cross multiply
    8,614.72x = 12,918.64 × 3,686.56
  4. Step 4: Simplify right side
    8,614.72x = 47,625,341.48
  5. Step 5: Solve for x
    x = 47,625,341.48/8,614.72
  6. Step 6: Final answer
    x = 5,528.37

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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.