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Finding the Fourth Proportional to 11,930.99, 17,899.28 and 3,611.07

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Solution

The fourth proportional to 11,930.99, 17,899.28 and 3,611.07 is: 5,417.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,930.99 : 17,899.28 = 3,611.07 : x
  2. Step 2: Convert to fraction form
    11,930.99/17,899.28 = 3,611.07/x
  3. Step 3: Cross multiply
    11,930.99x = 17,899.28 × 3,611.07
  4. Step 4: Simplify right side
    11,930.99x = 64,635,534.97
  5. Step 5: Solve for x
    x = 64,635,534.97/11,930.99
  6. Step 6: Final answer
    x = 5,417.45

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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.