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Finding the Fourth Proportional to 11,139, 16,707.92 and 3,347.52

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Solution

The fourth proportional to 11,139, 16,707.92 and 3,347.52 is: 5,021.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139 : 16,707.92 = 3,347.52 : x
  2. Step 2: Convert to fraction form
    11,139/16,707.92 = 3,347.52/x
  3. Step 3: Cross multiply
    11,139x = 16,707.92 × 3,347.52
  4. Step 4: Simplify right side
    11,139x = 55,930,096.36
  5. Step 5: Solve for x
    x = 55,930,096.36/11,139
  6. Step 6: Final answer
    x = 5,021.11

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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.