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Finding the Fourth Proportional to 11,393.80, 17,089.10 and 3,603.40

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Solution

The fourth proportional to 11,393.80, 17,089.10 and 3,603.40 is: 5,404.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,393.80 : 17,089.10 = 3,603.40 : x
  2. Step 2: Convert to fraction form
    11,393.80/17,089.10 = 3,603.40/x
  3. Step 3: Cross multiply
    11,393.80x = 17,089.10 × 3,603.40
  4. Step 4: Simplify right side
    11,393.80x = 61,578,862.94
  5. Step 5: Solve for x
    x = 61,578,862.94/11,393.80
  6. Step 6: Final answer
    x = 5,404.59

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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.