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Finding the Fourth Proportional to 11,357.08, 17,040.30 and 5,115.40

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Solution

The fourth proportional to 11,357.08, 17,040.30 and 5,115.40 is: 7,675.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,357.08 : 17,040.30 = 5,115.40 : x
  2. Step 2: Convert to fraction form
    11,357.08/17,040.30 = 5,115.40/x
  3. Step 3: Cross multiply
    11,357.08x = 17,040.30 × 5,115.40
  4. Step 4: Simplify right side
    11,357.08x = 87,167,950.62
  5. Step 5: Solve for x
    x = 87,167,950.62/11,357.08
  6. Step 6: Final answer
    x = 7,675.21

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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.