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Finding the Fourth Proportional to 11,645.50, 17,468.25 and 4,720

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Solution

The fourth proportional to 11,645.50, 17,468.25 and 4,720 is: 7,080

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,645.50 : 17,468.25 = 4,720 : x
  2. Step 2: Convert to fraction form
    11,645.50/17,468.25 = 4,720/x
  3. Step 3: Cross multiply
    11,645.50x = 17,468.25 × 4,720
  4. Step 4: Simplify right side
    11,645.50x = 82,450,140
  5. Step 5: Solve for x
    x = 82,450,140/11,645.50
  6. Step 6: Final answer
    x = 7,080

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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.