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Finding the Fourth Proportional to 17,580.75, 26,369.75 and 7,720.11

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Solution

The fourth proportional to 17,580.75, 26,369.75 and 7,720.11 is: 11,579.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,580.75 : 26,369.75 = 7,720.11 : x
  2. Step 2: Convert to fraction form
    17,580.75/26,369.75 = 7,720.11/x
  3. Step 3: Cross multiply
    17,580.75x = 26,369.75 × 7,720.11
  4. Step 4: Simplify right side
    17,580.75x = 203,577,389.97
  5. Step 5: Solve for x
    x = 203,577,389.97/17,580.75
  6. Step 6: Final answer
    x = 11,579.56

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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.