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Finding the Fourth Proportional to 11,720.78, 17,583.99 and 4,795.30

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Solution

The fourth proportional to 11,720.78, 17,583.99 and 4,795.30 is: 7,194.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,720.78 : 17,583.99 = 4,795.30 : x
  2. Step 2: Convert to fraction form
    11,720.78/17,583.99 = 4,795.30/x
  3. Step 3: Cross multiply
    11,720.78x = 17,583.99 × 4,795.30
  4. Step 4: Simplify right side
    11,720.78x = 84,320,507.25
  5. Step 5: Solve for x
    x = 84,320,507.25/11,720.78
  6. Step 6: Final answer
    x = 7,194.10

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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.