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Finding the Fourth Proportional to 17,391.61, 26,128.95 and 11,163.84

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Solution

The fourth proportional to 17,391.61, 26,128.95 and 11,163.84 is: 16,772.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,391.61 : 26,128.95 = 11,163.84 : x
  2. Step 2: Convert to fraction form
    17,391.61/26,128.95 = 11,163.84/x
  3. Step 3: Cross multiply
    17,391.61x = 26,128.95 × 11,163.84
  4. Step 4: Simplify right side
    17,391.61x = 291,699,417.17
  5. Step 5: Solve for x
    x = 291,699,417.17/17,391.61
  6. Step 6: Final answer
    x = 16,772.42

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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.