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Finding the Fourth Proportional to 11,699.78, 17,549.73 and 3,908.57

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Solution

The fourth proportional to 11,699.78, 17,549.73 and 3,908.57 is: 5,862.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,699.78 : 17,549.73 = 3,908.57 : x
  2. Step 2: Convert to fraction form
    11,699.78/17,549.73 = 3,908.57/x
  3. Step 3: Cross multiply
    11,699.78x = 17,549.73 × 3,908.57
  4. Step 4: Simplify right side
    11,699.78x = 68,594,260.44
  5. Step 5: Solve for x
    x = 68,594,260.44/11,699.78
  6. Step 6: Final answer
    x = 5,862.87

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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.