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Finding the Fourth Proportional to 11,418.90, 17,128.11 and 5,262.90

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Solution

The fourth proportional to 11,418.90, 17,128.11 and 5,262.90 is: 7,894.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,418.90 : 17,128.11 = 5,262.90 : x
  2. Step 2: Convert to fraction form
    11,418.90/17,128.11 = 5,262.90/x
  3. Step 3: Cross multiply
    11,418.90x = 17,128.11 × 5,262.90
  4. Step 4: Simplify right side
    11,418.90x = 90,143,530.12
  5. Step 5: Solve for x
    x = 90,143,530.12/11,418.90
  6. Step 6: Final answer
    x = 7,894.24

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1.5x scale

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.