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Finding the Fourth Proportional to 8,939.88, 13,409.62 and 5,265.42

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Solution

The fourth proportional to 8,939.88, 13,409.62 and 5,265.42 is: 7,898.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939.88 : 13,409.62 = 5,265.42 : x
  2. Step 2: Convert to fraction form
    8,939.88/13,409.62 = 5,265.42/x
  3. Step 3: Cross multiply
    8,939.88x = 13,409.62 × 5,265.42
  4. Step 4: Simplify right side
    8,939.88x = 70,607,217.89
  5. Step 5: Solve for x
    x = 70,607,217.89/8,939.88
  6. Step 6: Final answer
    x = 7,898.01

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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.