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Finding the Fourth Proportional to 11,430.20, 17,137.20 and 5,193.20

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Solution

The fourth proportional to 11,430.20, 17,137.20 and 5,193.20 is: 7,786.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,430.20 : 17,137.20 = 5,193.20 : x
  2. Step 2: Convert to fraction form
    11,430.20/17,137.20 = 5,193.20/x
  3. Step 3: Cross multiply
    11,430.20x = 17,137.20 × 5,193.20
  4. Step 4: Simplify right side
    11,430.20x = 88,996,907.04
  5. Step 5: Solve for x
    x = 88,996,907.04/11,430.20
  6. Step 6: Final answer
    x = 7,786.12

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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.